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Class Information
Number: 381/72
Name: Electrical audio signal processing systems and devices > Hearing protectors, electrical
Description: Subject matter which provides a barrier to the transmission of at least some sounds to the ear.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616769 |
Variable and shiftable acoustic output signal limiter |
Nov. 10, 2009 |
| 7512243 |
Hearing protection earplug with a movable attenuation button, method for manufacturing the same and use of the same |
Mar. 31, 2009 |
| 7489785 |
Noise cancellation system and headphone therefor |
Feb. 10, 2009 |
| 7418103 |
System and method for controlling states of a device |
Aug. 26, 2008 |
| 7401519 |
System for monitoring exposure to impulse noise |
Jul. 22, 2008 |
| 7367422 |
System and method for providing passive noise reduction |
May. 6, 2008 |
| 7352871 |
Apparatus for communication and reconnaissance coupled with protection of the auditory system |
Apr. 1, 2008 |
| 7327850 |
Supplying electrical power |
Feb. 5, 2008 |
| 7317802 |
Active-noise-reduction headsets with front-cavity venting |
Jan. 8, 2008 |
| 7308106 |
System and method for optimized active controller design in an ANR system |
Dec. 11, 2007 |
| 7289636 |
Electronic earplug for monitoring and reducing wideband noise at the tympanic membrane |
Oct. 30, 2007 |
| 7248706 |
Audio-signal detecting device |
Jul. 24, 2007 |
| 7231037 |
Active audio compressing in telecommunication |
Jun. 12, 2007 |
| 7177433 |
Method of improving the audibility of sound from a loudspeaker located close to an ear |
Feb. 13, 2007 |
| 7151835 |
Personal noise monitoring apparatus and method |
Dec. 19, 2006 |
| 7110551 |
Adaptive personal active noise reduction system |
Sep. 19, 2006 |
| 7103188 |
Variable gain active noise cancelling system with improved residual noise sensing |
Sep. 5, 2006 |
| 7054450 |
Method and system for ensuring audio safety |
May. 30, 2006 |
| 7039195 |
Ear terminal |
May. 2, 2006 |
| 7006650 |
Device for attenuating sound on the human ear |
Feb. 28, 2006 |
| 7003123 |
Volume regulating and monitoring system |
Feb. 21, 2006 |
| 6961436 |
Noise-protecting arrangement for ear protector |
Nov. 1, 2005 |
| 6941161 |
Microphone position and speech level sensor |
Sep. 6, 2005 |
| 6898290 |
Adaptive personal active noise reduction system |
May. 24, 2005 |
| 6831984 |
Noise reducing |
Dec. 14, 2004 |
| 6826287 |
Earmuff with controlled leak |
Nov. 30, 2004 |
| 6801629 |
Protective hearing devices with multi-band automatic amplitude control and active noise attenuation |
Oct. 5, 2004 |
| 6768803 |
Method and apparatus for selective acoustic signal filtering |
Jul. 27, 2004 |
| 6661901 |
Ear terminal with microphone for natural voice rendition |
Dec. 9, 2003 |
| 6625277 |
Low current signal compression circuit |
Sep. 23, 2003 |
| 6567524 |
Noise protection verification device |
May. 20, 2003 |
| 6463316 |
Delay based active noise cancellation for magnetic resonance imaging |
Oct. 8, 2002 |
| 6449806 |
Head strap for headphones or hearing protector |
Sep. 17, 2002 |
| 6442279 |
Acoustic conditioner |
Aug. 27, 2002 |
| 6278786 |
Active noise cancellation aircraft headset system |
Aug. 21, 2001 |
| 6122383 |
Device for reducing noise |
Sep. 19, 2000 |
| 6118878 |
Variable gain active noise canceling system with improved residual noise sensing |
Sep. 12, 2000 |
| 6091825 |
Sound baffling device |
Jul. 18, 2000 |
| 6078672 |
Adaptive personal active noise system |
Jun. 20, 2000 |
| 6058194 |
Sound-capture and listening system for head equipment in noisy environment |
May. 2, 2000 |
| 6041126 |
Noise cancellation system |
Mar. 21, 2000 |
| 6035047 |
System to block unwanted sound waves and alert while sleeping |
Mar. 7, 2000 |
| 5987144 |
Personal active noise cancellation method and device having invariant impulse response |
Nov. 16, 1999 |
| 5970795 |
Apparatus and method for testing attenuation of in-use insert hearing protectors |
Oct. 26, 1999 |
| 5970155 |
Headset for hearing protectors |
Oct. 19, 1999 |
| 5815582 |
Active plus selective headset |
Sep. 29, 1998 |
| 5748752 |
Adaptive voice enhancing system |
May. 5, 1998 |
| 5745581 |
Tracking filter for periodic signals |
Apr. 28, 1998 |
| 5740258 |
Active noise supressors and methods for use in the ear canal |
Apr. 14, 1998 |
| 5692056 |
Method and apparatus for intracranial noise suppression |
Nov. 25, 1997 |
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