WO2009043550A1 - Earphone and method for active noise compensation - Google Patents

Earphone and method for active noise compensation Download PDF

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Publication number
WO2009043550A1
WO2009043550A1 PCT/EP2008/008217 EP2008008217W WO2009043550A1 WO 2009043550 A1 WO2009043550 A1 WO 2009043550A1 EP 2008008217 W EP2008008217 W EP 2008008217W WO 2009043550 A1 WO2009043550 A1 WO 2009043550A1
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WO
WIPO (PCT)
Prior art keywords
microphone
active noise
noise compensation
compensation
output signal
Prior art date
Application number
PCT/EP2008/008217
Other languages
German (de)
French (fr)
Inventor
Markus Kuhr
Original Assignee
Sennheiser Electronic Gmbh & Co. Kg
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Filing date
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Application filed by Sennheiser Electronic Gmbh & Co. Kg filed Critical Sennheiser Electronic Gmbh & Co. Kg
Publication of WO2009043550A1 publication Critical patent/WO2009043550A1/en

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1783—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
    • G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets

Definitions

  • the present invention relates to a handset and a method for active noise compensation
  • DE 199 26 552 A1 shows a headphone with an electro-acoustic transducer, a noise compensation unit and a microphone for recording environmental alarm
  • BESTATIGUNGSKOPIE The signal from the microphone is used for active noise compensation and can be reproduced via the converter.
  • a handset which has at least one electroacoustic transducer, an active noise compensation unit for active noise compensation and a microphone for recording ambient noise, in particular ambient noise.
  • the output signal of the microphone is forwarded to the active noise compensation unit so that an active noise compensation can be performed.
  • the microphone is used to record ambient noise, in particular speech signals, which can be reproduced via the electroacoustic transducer.
  • the handset further includes an internal microphone whose output is used by the active noise cancellation unit for active noise cancellation.
  • the signals recorded by the microphone are used in a compensation mode for active noise cancellation by the noise compensation unit, and in a communication mode, the signals recorded by the microphone are output to the at least one electroacoustic transducer and reproduced.
  • the invention also relates to a method for active noise compensation.
  • a microphone located in a receiver serves to record ambient noise or ambient noise.
  • the output signal of the microphone is used for active noise compensation.
  • the output signal of the microphone can also be forwarded to an electroacoustic transducer in the listener to be reproduced there.
  • Ambient noise, in particular ambient noise is recorded by means of an internal microphone and forwarded for active noise compensation.
  • the invention relates to the idea of providing a headphone with an active noise compensation unit, wherein the headset likewise has a "talk-through” Functionality has To configure this "Talk Through" -Funkt ⁇ onal ⁇ tat the need for the active noise compensation microphone is used to record voice signals, which can then be reproduced on the electroacoustic transducer of the headphone
  • the headphone has at least one electro-acoustic transducer for playback of audio signals and a Compensation microphone for recording the environmental alarm, wherein the audio signals recorded by the microphone are supplied to the active Larmkompensationstechnik and the active Larmkompensationstechnik can output a Larmkompensêtêtators signal to the at least one electroacoustic transducer for the "talk through" -Funkt ⁇ onal ⁇ tat the compensation microphone is used, so that the recorded by the microphone signals are then not forwarded to the noise compensation unit for active noise compensation, but to the electroacoustic transducer
  • FIG. 1 shows a schematic representation of a headphone according to a first exemplary embodiment
  • FIG. 2 shows a schematic representation of a headphone according to a second exemplary embodiment
  • FIG. 3 shows a schematic representation of a headphone according to a third exemplary embodiment
  • the headphone has a headball B, at least one electroacoustic transducer W, an ear pad O, a compensation microphone KM, which is arranged in or on the hearing aid housing, and an active noise compensation unit LKU for active noise compensation
  • the microphone KM can, for example, be arranged on the outside of the hearing aid housing.
  • the output signal of the compensation microphone can be fed to the active noise compensation unit so that it performs a corresponding noise compensation based on the output signal
  • the output microphone KM can also be forwarded to the electro-acoustic transducer W to be output there.
  • the output signal of the compensation microphone can be switched to the active Larmkompensationshim or to the electro-acoustic transducer
  • the output of the internal microphone can also be to the active
  • the active noise compensation unit can receive the output signal of the internal microphone and / or the output signal of the compensation microphone KM By switching the compensation microphone, a so-called "talk through" -Funkt ⁇ onal ⁇ tat be guaranteed, ie a voice signal is from the compensation microphone recorded and passed on to the electro-acoustic reproduction converter
  • FIG. 2 shows a schematic representation of a headphone according to a second exemplary embodiment.
  • FIG. 2 shows some of the electrical or electronic components in order to describe an exemplary signal flow in more detail according to the second exemplary embodiment.
  • An (external) audio unit A is used for supplying or receiving a to be reproduced Audiosignais
  • the output of the audio unit A is fed to a filter H (z) H2 and a filter H (z) H4
  • the headphone further comprises at least one electroacoustic transducer W, which is disposed within the Horergehauses, an internal microphone Ml, which is also in the
  • the output signals of the two microphones Ml, MA are each amplified via amplifiers V3 and V2 amplified by the amplifier V2 output signals of the microphone MA are a vari
  • the output signal of the microphone M1 amplified by the amplifier V3 is added in a summing unit S1 to the output signal of the filter H2 and the output signal of the filter H1, the output signal of
  • a switch S is further provided between the amplifier V2 and the filter H1.
  • the switch S When the switch S is closed, the "talk through" function of the headphone can be utilized and that recorded by the outside microphone MA Audio signal is reproduced by the electro-acoustic transducer W For this purpose, the variable filter VH is switched
  • the internal microphone Ml is used here as a compensation microphone or as a control microphone for active noise compensation
  • the external microphone MA is used to provide the "talk througlY" function
  • the external microphone can optionally also be used for active noise compensation
  • FIG. 3 shows a schematic representation of a headphone according to a third exemplary embodiment.
  • the headphone according to the third exemplary embodiment has only a single microphone which serves both as a compensation or control microphone and as a microphone for implementing the "talk through" functionality
  • Headphone thus has an electroacoustic transducer W within the Horergehau- ses, a microphone MA outside the Horergehause, an audio unit A, a Versterk- V2 to Verocc the output of the microphone MA and a Verstarker V1 for Verintestin the audio signal to be reproduced on Behind the amplifier V2 is the variable filter Var H (z) VH. Behind the audio unit A is provided a filter H (z) H4. In the summing unit S2, the output of the variable filter VH and the output of the filter H4 are added together, and the output of the summing purity S2 is output to the amplifier V1
  • variable filter VH If the microphone MA used for the active noise compensation is to be used to implement the "talk through" radio frequency, then the variable filter VH must be switched over

Abstract

The invention provides an earphone having at least one electroacoustic transducer (W), an active noise compensation unit (LKU) for active noise compensation and a microphone (KM, MA) for recording the ambient noise. The output signal from the microphone (MA) is forwarded to the active noise compensation unit (LKU) so that active noise compensation can be carried out. The microphone (MA) is used to record voice signals which can be reproduced using the electroacoustic transducer (W). The earphone also has an internal microphone, the output signal from which is supplied to the active noise compensation unit.

Description

Hörer und Verfahren zur aktiven Larmkompensation Handset and method for active noise compensation
Die vorliegende Erfindung betrifft einen Hörer und ein Verfahren zur aktiven LarmkompensationThe present invention relates to a handset and a method for active noise compensation
Es sind Kopfhörer, beispielsweise für Piloten, bekannt, bei denen eine aktive Larmkompensation durchgeführt wird, um Umgebungsgerausche zu dampfenThere are headphones, for example for pilots, known in which an active noise compensation is performed to steam around ambient noise
Eine aktive Larmkompensation fuhrt jedoch ebenfalls dazu, dass Sprache auch als Lärm erfasst und entsprechend kompensiert bzw gedampft wird Somit ist eine Verständigung mit Personen, welche einen Kopfhörer mit einer aktiven Larmkompensation tragen, oftmals schwierig Um eine verbesserte Verständigung mit den Tragern von Kopfhörern mit einer aktiven Larmkompensation zu erreichen, wurde eine sogenannte „Talk through"- Funktion implementiert Dazu wird ein zusätzliches Mikrofon vorgesehen, welches die Sprachsignale aufzeichnet, so dass die aufgezeichneten Sprachsignale über die elekt- roakustischen Wiedergabewandler des Kopfhörers wiedergegeben werden können, wobei die aktive Larmkompensation dabei deaktiviert werden kannHowever, an active noise compensation also leads to the fact that speech is also detected as noise and compensated or attenuated accordingly. Thus, an agreement with persons who wear a headphone with an active noise compensation, often difficult To improve communication with the wearers of headphones with an active To achieve this, a so-called "talk through" function has been implemented. An additional microphone is provided which records the speech signals so that the recorded speech signals can be reproduced via the headphone's acoustic replay transducers, whereby the active noise compensation is deactivated can
DE 199 26 552 A1 zeigt einen Kopfhörer mit einem elektro-akustischen Wandler, einer Larmkompensationseinheit und einem Mikrofon zum Aufzeichnen von UmgebungslarmDE 199 26 552 A1 shows a headphone with an electro-acoustic transducer, a noise compensation unit and a microphone for recording environmental alarm
BESTATIGUNGSKOPIE Das Signal des Mikrofons dient der aktiven Lärmkompensation und kann über den Wandler wiedergegeben werden.BESTATIGUNGSKOPIE The signal from the microphone is used for active noise compensation and can be reproduced via the converter.
Es ist eine Aufgabe der vorliegenden Erfindung, einen Kopfhörer mit einer aktiven Lärmkompensation vorzusehen, welcher eine verbesserte Verständigung ermöglicht und kostengünstiger hergestellt werden kann.It is an object of the present invention to provide a headphone with an active noise compensation, which allows for improved communication and can be manufactured more cheaply.
Diese Aufgabe wird durch einen Hörer gemäß Anspruch 1 und durch ein Verfahren zur aktiven Lärmkompensation in einem Hörer gemäß Anspruch 3 gelöst.This object is achieved by a receiver according to claim 1 and by a method for active noise compensation in a receiver according to claim 3.
Somit wird ein Hörer vorgesehen, welcher mindestens einen elektroakustischen Wandler, eine aktive Lärmkompensationseinheit zur aktiven Lärmkompensation und ein Mikrofon zum Aufzeichnen von Umgebungsgeräuschen, insbesondere Umgebungslärm aufweist. Das Ausgangssignal des Mikrofons wird an die aktive Lärmkompensationseinheit weitergeleitet, damit eine aktive Lärmkompensation durchgeführt werden kann. Das Mikrofon dient zum Aufzeichnen von Umgebungsgeräuschen, insbesondere Sprachsignalen, welche über den elektroakustischen Wandler wiedergegeben werden können. Der Hörer weist ferner ein Innenmikrofon auf, dessen Ausgangssignal von der aktiven Lärmkompensationseinheit zur aktiven Lärmkompensation verwendet wird.Thus, a handset is provided, which has at least one electroacoustic transducer, an active noise compensation unit for active noise compensation and a microphone for recording ambient noise, in particular ambient noise. The output signal of the microphone is forwarded to the active noise compensation unit so that an active noise compensation can be performed. The microphone is used to record ambient noise, in particular speech signals, which can be reproduced via the electroacoustic transducer. The handset further includes an internal microphone whose output is used by the active noise cancellation unit for active noise cancellation.
Gemäß einem Aspekt der vorliegenden Erfindung werden die durch das Mikrofon aufgezeichneten Signale in einer Kompensationsbetriebsart zur aktiven Lärmkompensation durch die Lärmkompensationseinheit verwendet, und in einer Kommunikationsbetriebsart werden die durch das Mikrofon aufgezeichneten Signale an den mindestens einen elektroakustischen Wandler ausgegeben und wiedergegeben.According to one aspect of the present invention, the signals recorded by the microphone are used in a compensation mode for active noise cancellation by the noise compensation unit, and in a communication mode, the signals recorded by the microphone are output to the at least one electroacoustic transducer and reproduced.
Die Erfindung betrifft ebenfalls ein Verfahren zur aktiven Lärmkompensation. Ein sich in einem Hörer befindliches Mikrofon dient zur Aufzeichnung von Umgebungsgeräuschen bzw. Umgebungslärm. Das Ausgangssignal des Mikrofons wird zur aktiven Lärmkompen- sation verwendet. Das Ausgangssignal des Mikrofons kann ebenfalls an einen elektroakustischen Wandler in dem Hörer weitergeleitet werden, um dort wiedergegeben zu werden. Umgebungsgeräusche, insbesondere Umgebungslärm, wird mittels eines Innenmikrofons aufgezeichnet und zur aktiven Lärmkompensation weitergeleitet.The invention also relates to a method for active noise compensation. A microphone located in a receiver serves to record ambient noise or ambient noise. The output signal of the microphone is used for active noise compensation. The output signal of the microphone can also be forwarded to an electroacoustic transducer in the listener to be reproduced there. Ambient noise, in particular ambient noise, is recorded by means of an internal microphone and forwarded for active noise compensation.
Die Erfindung bezieht sich auf den Gedanken, einen Kopfhörer mit einer aktiven Lärm- kompensationseinheit vorzusehen, wobei der Kopfhörer ebenfalls eine „Talk through"- Funktionalitat aufweist Zur Ausgestaltung dieser „Talk through"-Funktιonalιtat wird das für die aktive Larmkompensation benotigte Mikrofon verwendet, um Sprachsignale aufzuzeichnen, welche dann über die elektroakustischen Wandler des Kopfhörers wiedergebeben werden können Somit weist der Kopfhörer mindestens einen elektroakustischen Wandler zur Wiedergabe von Audiosignalen und ein Kompensationsmikrofon zur Aufzeichnung des Umgebungslarms auf, wobei die durch das Mikrofon aufgezeichneten Audiosignale der aktiven Larmkompensationseinheit zugeführt werden und die aktive Larmkompensationseinheit ein larmkompensiertes Signal an den mindestens einen elektroakustischen Wandler ausgeben kann Für die „Talk through"-Funktιonalιtat wird das Kompensationsmikrofon verwendet, so dass die durch das Mikrofon aufgezeichneten Signale dann nicht an die Larmkompensationseinheit zur aktiven Larmkompensation, sondern an die elektroakustischen Wandler weitergeleitet werdenThe invention relates to the idea of providing a headphone with an active noise compensation unit, wherein the headset likewise has a "talk-through" Functionality has To configure this "Talk Through" -Funktιonalιtat the need for the active noise compensation microphone is used to record voice signals, which can then be reproduced on the electroacoustic transducer of the headphone Thus, the headphone has at least one electro-acoustic transducer for playback of audio signals and a Compensation microphone for recording the environmental alarm, wherein the audio signals recorded by the microphone are supplied to the active Larmkompensationseinheit and the active Larmkompensationseinheit can output a Larmkompensiertes signal to the at least one electroacoustic transducer for the "talk through" -Funktιonalιtat the compensation microphone is used, so that the recorded by the microphone signals are then not forwarded to the noise compensation unit for active noise compensation, but to the electroacoustic transducer
Weitere Ausgestaltungen der Erfindung sind Gegenstand der UnteransprucheFurther embodiments of the invention are the subject of the dependent claims
Ausfuhrungsbeispiele und Vorteile der vorliegenden Erfindung werden nachstehend unter Bezugnahme auf die Zeichnung naher erläutertExemplary embodiments and advantages of the present invention will be explained in more detail below with reference to the drawing
Fig 1 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem ersten Ausfuhrungsbeispiel,1 shows a schematic representation of a headphone according to a first exemplary embodiment,
Fig 2 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem zweiten Ausfuhrungsbeispiel, und Fig 3 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem dritten Ausfuhrungsbeispiel2 shows a schematic representation of a headphone according to a second exemplary embodiment, and FIG. 3 shows a schematic representation of a headphone according to a third exemplary embodiment
Fig 1 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem ersten Ausfuhrungsbeispiel Der Kopfhörer weist einen Kopfbugel B, mindestens einen elektroakustischen Wandler W, ein Ohrpolster O, ein Kompensationsmikrofon KM, welches in bzw an dem Horergehause angeordnet ist, und eine aktive Larmkompensationseinheit LKU zur aktiven Larmkompensation auf Der Hörer kann auch ein Innenmikrofon aufweisen, dessen Ausgangssignal zur aktiven Larmkompensation verwendet wird Das Kompensationsmikrofon KM kann beispielsweise außen an dem Horergehause angeordnet sein Das Ausgangssignal des Kompensationsmikrofons kann der aktiven Larmkompensati- onseinheit zugeführt werden, damit diese basierend auf dem Ausgangssignal eine entsprechende Larmkompensation durchfuhren kann Das Ausgangssignal des Kompensa- tionsmikrofons KM kann jedoch auch an den elektro-akustischen Wandler W weitergelei- tet werden, um dort ausgegeben zu werden Somit kann das Ausgangssignal des Kompensationsmikrofons zu der aktiven Larmkompensationseinheit oder zu dem elektro- akustischen Wandler umgeschaltet werden Das Ausgangssignal des Innenmikrofons kann ebenfalls zu der aktiven Larmkompensationseinheit weitergeleitet werden und zur aktiven Larmkompensation verwendet werden Somit kann die aktive Larmkompensationseinheit das Ausgangssignal des Innenmikrofons und/oder das Ausgangssignal des Kompensationsmikrofons KM empfangen Durch Umschalten des Kompensationsmikrofons kann eine sogenannte „Talk through"-Funktιonalιtat gewährleistet werden, d h ein Sprachsignal wird von dem Kompensationsmikrofon aufgezeichnet und an den elektro- akustischen Wiedergabewandler weitergegeben1 shows a schematic representation of a headphone according to a first exemplary embodiment. The headphone has a headball B, at least one electroacoustic transducer W, an ear pad O, a compensation microphone KM, which is arranged in or on the hearing aid housing, and an active noise compensation unit LKU for active noise compensation The microphone KM can, for example, be arranged on the outside of the hearing aid housing. The output signal of the compensation microphone can be fed to the active noise compensation unit so that it performs a corresponding noise compensation based on the output signal The output signal of the compensa- However, the output microphone KM can also be forwarded to the electro-acoustic transducer W to be output there. Thus, the output signal of the compensation microphone can be switched to the active Larmkompensationseinheit or to the electro-acoustic transducer The output of the internal microphone can also be to the active Thus, the active noise compensation unit can receive the output signal of the internal microphone and / or the output signal of the compensation microphone KM By switching the compensation microphone, a so-called "talk through" -Funktιonalιtat be guaranteed, ie a voice signal is from the compensation microphone recorded and passed on to the electro-acoustic reproduction converter
Fig 2 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem zweiten Ausfuhrungsbeispiel In Fig 2 sind insbesondere einige der elektrischen bzw elektronischen Komponenten gezeigt, um einen exemplarischen Signalfluss gemäß dem zweiten Ausfuhrungsbeispiel detaillierter zu beschreiben Eine (externe) Audioeinheit A dient zum Zufuhren bzw zum Empfangen eines wiederzugebenden Audiosignais Das Ausgangssignal der Audioeinheit A wird einem Filter H(z) H2 und einem Filter H(z) H4 zugeführt Der Kopfhörer weist ferner wenigstens einen elektroakustischen Wandler W, welcher innerhalb des Horergehauses angeordnet ist, ein innen liegendes Mikrofon Ml, welches ebenfalls in dem Horergehause angeordnet ist, und ein außen liegendes Mikrofon MA, welches außen an dem Horergehause angeordnet ist, auf Die Ausgangssignale der beiden Mikrofone Ml, MA werden jeweils über Verstarker V3 und V2 verstärkt Die durch den Verstarker V2 verstärkten Ausgangssignale des Mikrofons MA werden einem variablen Filter Var H(z) VH zugeführt Das durch den Verstarker V3 verstärkte Ausgangssignal des Mikrofons Ml wird in einer Summiereinheit S1 zu dem Ausgangssignal des Filters H2 und dem Ausgangssignal des Filters H1 hinzu addiert, wobei das Ausgangssignal der Summiereinheit S1 einem dritten Filter H3 zugeführt wird In der zweiten Summiereinheit S2 wird das Ausgangssignal des Filters H4, das Ausgangssignal des Filters H3 sowie das Ausgangssignal des variablen Filters VH zusammen addiert, und das Ausgangssignal der Summiereinheit S2 wird an einen Verstarker V1 ausgegeben, welcher das Signal verstärkt und zur Wiedergabe an den elektroakustischen Wandler W weiterleitet2 shows a schematic representation of a headphone according to a second exemplary embodiment. In particular, FIG. 2 shows some of the electrical or electronic components in order to describe an exemplary signal flow in more detail according to the second exemplary embodiment. An (external) audio unit A is used for supplying or receiving a to be reproduced Audiosignais The output of the audio unit A is fed to a filter H (z) H2 and a filter H (z) H4 The headphone further comprises at least one electroacoustic transducer W, which is disposed within the Horergehauses, an internal microphone Ml, which is also in the The output signals of the two microphones Ml, MA are each amplified via amplifiers V3 and V2 amplified by the amplifier V2 output signals of the microphone MA are a vari The output signal of the microphone M1 amplified by the amplifier V3 is added in a summing unit S1 to the output signal of the filter H2 and the output signal of the filter H1, the output signal of the summing unit S1 being fed to a third filter H3 In the second summing unit S2, the output of the filter H4, the output of the filter H3 and the output of the variable filter VH are added together, and the output of the summing unit S2 is output to an amplifier V1 which amplifies the signal and reproduces it for reproduction electroacoustic transducer W passes
In dem Kopfhörer ist ferner ein Schalter S zwischen dem Verstarker V2 und dem Filter H1 vorgesehen Wenn der Schalter S geschlossen ist, dann kann die „Talk through"-Funktιon des Kopfhörers genutzt werden, und das durch das Außenmikrofon MA aufgezeichnete Audiosignal wird durch den elektroakustischen Wandler W wiedergegeben Hierzu wird das variable Filter VH umgeschaltetIn the headset, a switch S is further provided between the amplifier V2 and the filter H1. When the switch S is closed, the "talk through" function of the headphone can be utilized and that recorded by the outside microphone MA Audio signal is reproduced by the electro-acoustic transducer W For this purpose, the variable filter VH is switched
Das Innenmikrofon Ml wird hierbei als Kompensationsmikrofon bzw als Regelungsmikrofon für die aktive Larmkompensation verwendet Das Außenmikrofon MA wird dazu verwendet, die „Talk througlY'-Funktionahtat vorzusehen Das Außenmikrofon kann optional ebenfalls zur aktiven Larmkompensation verwendet werden Hierbei kann das Ausgangssignal des Außenmikrofons an die aktive Larmkompensationseinheit weitergeleitet werdenThe internal microphone Ml is used here as a compensation microphone or as a control microphone for active noise compensation The external microphone MA is used to provide the "talk througlY" function The external microphone can optionally also be used for active noise compensation Here, the output signal of the external microphone to the active Larmkompensationseinheit to get redirected
Fig 3 zeigt eine schematische Darstellung eines Kopfhörers gemäß einem dritten Aus- fuhrungsbeispiel Der Kopfhörer gemäß dem dritten Ausfuhrungsbeispiel weist lediglich ein einzelnes Mikrofon auf, welches sowohl als Kompensations- bzw Regelungsmikrofon als auch als Mikrofon zur Implementierung der „Talk through"-Funktιonalιtat dient DerFIG. 3 shows a schematic representation of a headphone according to a third exemplary embodiment. The headphone according to the third exemplary embodiment has only a single microphone which serves both as a compensation or control microphone and as a microphone for implementing the "talk through" functionality
Kopfhörer weist somit einen elektroakustischen Wandler W innerhalb des Horergehau- ses, ein Mikrofon MA außen an dem Horergehause, eine Audioeinheit A, einen Verstar- ker V2 zum Verstarken des Ausgangssignals des Mikrofons MA und einen Verstarker V1 zum Verstarken des wiederzugebenden Audiosignais auf Hinter dem Verstarker V2 ist das variable Filter Var H(z) VH angeordnet Hinter der Audioeinheit A ist ein Filter H(z) H4 vorgesehen In der Summiereinheit S2 wird das Ausgangssignal des variablen Filters VH und das Ausgangssignal des Filters H4 addiert, und das Ausgangssignal der Summie- reinheit S2 wird an den Verstarker V1 ausgegebenHeadphone thus has an electroacoustic transducer W within the Horergehau- ses, a microphone MA outside the Horergehause, an audio unit A, a Versterk- V2 to Verstarken the output of the microphone MA and a Verstarker V1 for Verstarken the audio signal to be reproduced on Behind the amplifier V2 is the variable filter Var H (z) VH. Behind the audio unit A is provided a filter H (z) H4. In the summing unit S2, the output of the variable filter VH and the output of the filter H4 are added together, and the output of the summing purity S2 is output to the amplifier V1
Wenn das für die aktive Larmkompensation verwendete Mikrofon MA zur Implementierung der „Talk through"-Funktιonalιtat verwendet werden soll, dann muss das variable Filter VH umgeschaltet werden If the microphone MA used for the active noise compensation is to be used to implement the "talk through" radio frequency, then the variable filter VH must be switched over

Claims

AnsprucheClaims
1 Hörer, mit mindestens einem elektroakustischen Wandler (W), einer aktiven Larmkompensationseinheit (LKU) zur aktiven Larmkompensation, einem Mikrofon (KM, MA) zum Aufzeichnen von Umgebungsgerauschen, insbesondere Umgebungslarm, wobei das Ausgangssignal des Mikrofons (MA) an die aktive Larmkompensationseinheit (LKU) weitergeleitet wird, um eine aktive Larmkompensation durchzufuhren, und wobei das Mikrofon (MA) zum Aufzeichnen von Umgebungsgerauschen, msbe- sondere Sprachsignalen, verwendet wird, welche über den elektroakustischen Wandler (W) wiedergegeben werden können, und einem Innenmikrofon (Ml), dessen Ausgangssignal von der aktiven Larmkompensationseinheit (LKU) zur aktiven Larmkompensation verwendet wird1 receiver, comprising at least one electroacoustic transducer (W), an active noise compensation unit (LKU) for active noise compensation, a microphone (KM, MA) for recording ambient noise, in particular environmental alarm, wherein the output signal of the microphone (MA) to the active noise compensation unit ( LKU) to perform active noise compensation, and wherein the microphone (MA) is used to record ambient noise, ms special speech signals, which can be reproduced via the electroacoustic transducer (W) and an internal microphone (M1), whose output signal is used by the active noise compensation unit (LKU) for active noise compensation
2 Hörer nach Anspruch 1 , wobei in einer Kompensationsbetriebsart die durch das Mikrofon aufgezeichneten Signale zur aktiven Larmkompensation durch die Larmkompensationseinheit (LKU) verwendet werden können und wobei in einer Kommunikationsbetriebsart die durch das Mikrofon (MA) aufgezeichneten Signale an den mindestens einen elektroakustischen Wandler ausgegeben und wiedergegeben werden könnenA handset according to claim 1, wherein in a compensation mode the signals recorded by the microphone can be used for active noise compensation by the noise compensation unit (LKU) and in a communication mode the signals recorded by the microphone (MA) are output to the at least one electroacoustic transducer and can be played back
3 Verfahren zur aktiven Larmkompensation in einem Hörer, mit den Schritten Aufzeichnen von Umgebungsgerauschen, insbesondere Umgebungslarm, mittels eines Mikrofons (KM, MA) an dem Hörer,3 A method for active noise compensation in a receiver, comprising the steps of recording ambient noise, in particular ambient alarm, by means of a microphone (KM, MA) on the receiver,
Weiterleiten des Ausgangssignals des Mikrofons zur aktiven Larmkompensation, Weiterleiten des Ausgangssignals des Mikrofons an einen elektroakustischen Wandler (W) in dem Hörer zur Wiedergabe der durch das Mikrofon aufgezeichneten Signale,Forwarding the output signal of the microphone for active noise compensation, forwarding the output signal of the microphone to an electroacoustic transducer (W) in the receiver for reproducing the signals recorded by the microphone,
Aufzeichnen von Umgebungsgerauschen, insbesondere Umgebungslarm, mittels eines Innenmikrofons und Weiterleiten des Ausgangssignals des Innenmikrofons an die aktive Larmkompensationseinheit (LKU)Record ambient noise, especially ambient noise, by means of an internal microphone and forward the output signal of the internal microphone to the active noise compensation unit (LKU)
4 Verfahren nach Anspruch 3, wobei die durch das Mikrofon aufgezeichneten Signale in einer Kompensationsbetriebsart zur aktiven Larmkompensation verwendet werden und in einer Kommunikationsbetriebsart durch die elektroakustischen Wandler wiedergegeben werden The method of claim 3, wherein the signals recorded by the microphone are used in a compensation mode for active noise compensation and are reproduced in a communication mode by the electro-acoustic transducers
PCT/EP2008/008217 2007-09-27 2008-09-26 Earphone and method for active noise compensation WO2009043550A1 (en)

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