WO2008088388A3 - Methods and systems for determining the effectiveness of active noise cancellation - Google Patents

Methods and systems for determining the effectiveness of active noise cancellation Download PDF

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Publication number
WO2008088388A3
WO2008088388A3 PCT/US2007/018508 US2007018508W WO2008088388A3 WO 2008088388 A3 WO2008088388 A3 WO 2008088388A3 US 2007018508 W US2007018508 W US 2007018508W WO 2008088388 A3 WO2008088388 A3 WO 2008088388A3
Authority
WO
WIPO (PCT)
Prior art keywords
noise
cancellation
threshold value
noise cancellation
exceeds
Prior art date
Application number
PCT/US2007/018508
Other languages
French (fr)
Other versions
WO2008088388A2 (en
Inventor
David C Copley
Benjamin M Faber
Scott D Sommerfeldt
Original Assignee
Caterpillar Inc
Univ Brigham Young
David C Copley
Benjamin M Faber
Scott D Sommerfeldt
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc, Univ Brigham Young, David C Copley, Benjamin M Faber, Scott D Sommerfeldt filed Critical Caterpillar Inc
Publication of WO2008088388A2 publication Critical patent/WO2008088388A2/en
Publication of WO2008088388A3 publication Critical patent/WO2008088388A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • 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
    • G10K11/17825—Error signals
    • 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
    • G10K11/17833—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 by using a self-diagnostic function or a malfunction prevention function, e.g. detecting abnormal output levels
    • 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
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
    • 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
    • G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed

Abstract

A method for controlling a noise cancellation system having an adaptive control portion is provided. The noise cancellation system is operable to generate a cancellation noise configured to at least partially cancel an unwanted noise in a defined environment. The adaptive control portion is operable to adjust the operation of the noise cancellation system based on a level of unwanted noise that remains when the cancellation noise and the unwanted noise are combined. The method includes receiving an error signal representing a portion of a noise not cancelled by a cancellation noise, where the cancellation noise is generated from the noise cancellation system. The method also includes determining whether the level of the error signal exceeds a first threshold value for a first predetermined period of time. The method also includes calculating a crest factor using the error signal. The method also includes determining whether the crest factor exceeds a second threshold value. The method also includes deactivating the adaptive control system and continuing to operate the noise cancellation system if the error value exceeds the first threshold value for the predetermined period of time and the crest factor exceeds the second threshold value.
PCT/US2007/018508 2006-12-28 2007-08-22 Methods and systems for determining the effectiveness of active noise cancellation WO2008088388A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/646,402 2006-12-28
US11/646,402 US7933420B2 (en) 2006-12-28 2006-12-28 Methods and systems for determining the effectiveness of active noise cancellation

Publications (2)

Publication Number Publication Date
WO2008088388A2 WO2008088388A2 (en) 2008-07-24
WO2008088388A3 true WO2008088388A3 (en) 2008-10-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/018508 WO2008088388A2 (en) 2006-12-28 2007-08-22 Methods and systems for determining the effectiveness of active noise cancellation

Country Status (2)

Country Link
US (1) US7933420B2 (en)
WO (1) WO2008088388A2 (en)

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US8760271B2 (en) 2011-11-10 2014-06-24 Honeywell International Inc. Methods and systems to support auditory signal detection
US9688295B2 (en) 2013-08-23 2017-06-27 Electro-Motive Diesel, Inc. Trainline network access point for parallel communication
US9270335B2 (en) 2013-08-23 2016-02-23 Electro-Motive Diesel, Inc. Receive attenuation system for trainline communication networks
US9463816B2 (en) 2013-08-23 2016-10-11 Electro-Motive Diesel, Inc. Trainline communication network access point including filter
US9260123B2 (en) 2013-08-23 2016-02-16 Electro-Motive Diesel, Inc. System and method for determining locomotive position in a consist
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US9744979B2 (en) 2014-04-11 2017-08-29 Electro-Motive Diesel, Inc. Train communication network
US10149047B2 (en) * 2014-06-18 2018-12-04 Cirrus Logic Inc. Multi-aural MMSE analysis techniques for clarifying audio signals
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US20190061617A1 (en) * 2017-08-29 2019-02-28 GM Global Technology Operations LLC Audio Control Systems And Methods Based On Driver Helmet Use
EP3680639B1 (en) * 2017-09-06 2023-11-15 Nippon Telegraph and Telephone Corporation Abnormality model learning device, method, and program
JP7027738B2 (en) * 2017-09-06 2022-03-02 株式会社デンソー Driving support device
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US10800409B2 (en) * 2018-09-04 2020-10-13 Caterpillar Paving Products Inc. Systems and methods for operating a mobile machine using detected sounds
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Also Published As

Publication number Publication date
US7933420B2 (en) 2011-04-26
US20080159549A1 (en) 2008-07-03
WO2008088388A2 (en) 2008-07-24

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