|
| US4041251 | 16 oct. 1975 | 9 août 1977 | U.S. Philips Corporation | Hearing aid to be worn behind the ear of the user and provided with a pressure-gradient microphone |
| US4972488 | 12 juin 1989 | 20 nov. 1990 | Beltone Electronics Corporation | Ear wax barrier and acoustic attenuator for a hearing aid |
| US5239588 | 18 déc. 1989 | 24 août 1993 | | Hearing aid |
| US5329593 | 10 mai 1993 | 12 juil. 1994 | | Noise cancelling microphone |
| US5365595 | 19 févr. 1993 | 15 nov. 1994 | Motorola, Inc. | Sealed microphone assembly |
| US5448637 | 30 mars 1995 | 5 sept. 1995 | Pan Communications, Inc. | Two-way communications earset |
| US5606607 | 6 juin 1995 | 25 févr. 1997 | Pan Communications, Inc. | Two-way communications earset |
| US5664014 | 6 juin 1995 | 2 sept. 1997 | Pan Communications, Inc. | Two-way communications earset |
| US5793875 | 22 avr. 1996 | 11 août 1998 | Cardinal Sound Labs, Inc. | Directional hearing system |
| US5844984 | 21 nov. 1994 | 1 déc. 1998 | Pan Communications, Inc. | Two-way communications earset with filter |
| US5933510 | 2 oct. 1997 | 3 août 1999 | Siemens Information and Communication Networks, Inc. | User selectable unidirectional/omnidirectional microphone housing |
| US5949889 | 2 sept. 1997 | 7 sept. 1999 | The United States of America as represented by the Secretary of the Navy | Directional hearing aid |
| US6160896 | 8 mai 1998 | 12 déc. 2000 | Motorola, Inc. | Variable frequency response microphone porting system |
| US6272360 | 3 juil. 1997 | 7 août 2001 | Pan Communications, Inc. | Remotely installed transmitter and a hands-free two-way voice terminal device using same |
| US6597793 | 6 août 1998 | 22 juil. 2003 | Resistance Technology, Inc. | Directional/omni-directional hearing aid microphone and housing |
| US6681021 | 18 déc. 1998 | 20 janv. 2004 | Siemens Hearing Instruments, Inc. | Directional ITE hearing aid using dual-input microphone |
| US7103196 | 12 mars 2002 | 5 sept. 2006 | Knowles Electronics, LLC. | Method for reducing distortion in a receiver |
| US7136498 | 16 déc. 1999 | 14 nov. 2006 | Koninklijke Philips Electronics N.V. | Loudspeaker having a dual chamber acoustical enclosure with two external vents and one internal vent |
| US7245733 | 3 févr. 2003 | 17 juil. 2007 | Siemens Hearing Instruments, Inc. | Hearing instrument microphone arrangement with improved sensitivity |
| US7676050 | 10 mars 2006 | 9 mars 2010 | Siemens Audiologische Technik GmbH | Cover fixture for at least one microphone input of a hearing device |
| US7756284 | 30 janv. 2006 | 13 juil. 2010 | Songbird Hearing, Inc. | Hearing aid circuit with integrated switch and battery |
| US7756285 | 30 janv. 2006 | 13 juil. 2010 | Songbird Hearing, Inc. | Hearing aid with tuned microphone cavity |
| US8121326 | 9 oct. 2009 | 21 févr. 2012 | K/S Himpp | Hearing aid |
| US8121327 | 9 oct. 2009 | 21 févr. 2012 | K/S HIMPP | Hearing aid |