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Class Information
Number: 381/74
Name: Electrical audio signal processing systems and devices > Headphone circuits
Description: Subject matter having means to perform a desired electrical or electronic function in conjunction with a device held against the ear having a diaphragm which vibrates according to current variations.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623669 |
Simplified amplifier providing sharing of music with enhanced spatial presence through multiple headphone jacks |
Nov. 24, 2009 |
| 7623667 |
Electronic device accessory with ultrasonic tone generator |
Nov. 24, 2009 |
| 7616769 |
Variable and shiftable acoustic output signal limiter |
Nov. 10, 2009 |
| 7616767 |
Method and device for determining acoustical transfer impedance |
Nov. 10, 2009 |
| 7564966 |
Recognition of audio device in portable terminal |
Jul. 21, 2009 |
| 7519185 |
Earphone detection circuit |
Apr. 14, 2009 |
| 7502478 |
Stereo audio headset interface and method that is compatible with mono headsets |
Mar. 10, 2009 |
| 7496387 |
Wireless headset for use in speech recognition environment |
Feb. 24, 2009 |
| 7493079 |
Mobile terminal, method for recording/reproducing broadcast in mobile terminal, and broadcast recording/reproduction program |
Feb. 17, 2009 |
| 7474754 |
Method for canceling unwanted loudspeaker signals |
Jan. 6, 2009 |
| 7466838 |
Electroacoustic devices with noise-reducing capability |
Dec. 16, 2008 |
| 7460676 |
Headphone driving circuit |
Dec. 2, 2008 |
| 7450726 |
Headset detector in a device generating audio signals |
Nov. 11, 2008 |
| 7430300 |
Sound production systems and methods for providing sound inside a headgear unit |
Sep. 30, 2008 |
| 7418103 |
System and method for controlling states of a device |
Aug. 26, 2008 |
| 7412070 |
Headphoning |
Aug. 12, 2008 |
| 7409064 |
Music reproduction apparatus, audio player, and headphone |
Aug. 5, 2008 |
| 7395090 |
Personal portable integrator for music player and mobile phone |
Jul. 1, 2008 |
| 7388960 |
Multimedia speaker headphone |
Jun. 17, 2008 |
| 7373182 |
Wireless mobile phone including a headset |
May. 13, 2008 |
| 7367422 |
System and method for providing passive noise reduction |
May. 6, 2008 |
| 7356362 |
Headset structure with built-in audio source |
Apr. 8, 2008 |
| 7352871 |
Apparatus for communication and reconnaissance coupled with protection of the auditory system |
Apr. 1, 2008 |
| 7349546 |
System and method for identifying a headset type in an electrical device |
Mar. 25, 2008 |
| 7346175 |
System and apparatus for speech communication and speech recognition |
Mar. 18, 2008 |
| 7337027 |
Audio signal reproducing apparatus |
Feb. 26, 2008 |
| 7333622 |
Dynamic binaural sound capture and reproduction |
Feb. 19, 2008 |
| 7330553 |
Audio signal reproducing apparatus |
Feb. 12, 2008 |
| 7327850 |
Supplying electrical power |
Feb. 5, 2008 |
| 7319762 |
Headset with flashing light emitting diodes |
Jan. 15, 2008 |
| 7317802 |
Active-noise-reduction headsets with front-cavity venting |
Jan. 8, 2008 |
| 7299142 |
System and method for prevention of accidental activation of portable audio device |
Nov. 20, 2007 |
| 7283635 |
Headset with memory |
Oct. 16, 2007 |
| 7272073 |
Method and device for generating information relating to the relative position of a set of at least three acoustic transducers |
Sep. 18, 2007 |
| 7269446 |
Hands-free signal processing device in a mobile communication terminal |
Sep. 11, 2007 |
| 7260231 |
Multi-channel audio panel |
Aug. 21, 2007 |
| 7254415 |
Portable wireless terminal, method of outputting sound, and method of picking up sound |
Aug. 7, 2007 |
| 7251335 |
Self contained MP3 player and earphones |
Jul. 31, 2007 |
| 7248705 |
Noise reducing headphones with sound conditioning |
Jul. 24, 2007 |
| 7248707 |
Detection circuit |
Jul. 24, 2007 |
| 7231037 |
Active audio compressing in telecommunication |
Jun. 12, 2007 |
| 7227958 |
Connector device for detecting insertion or removal of plug from common jack |
Jun. 5, 2007 |
| 7203327 |
Apparatus for and method of processing audio signal |
Apr. 10, 2007 |
| 7190797 |
Headset with foldable noise canceling and omnidirectional dual-mode boom |
Mar. 13, 2007 |
| 7181024 |
Portable audio listening apparatus |
Feb. 20, 2007 |
| 7177433 |
Method of improving the audibility of sound from a loudspeaker located close to an ear |
Feb. 13, 2007 |
| 7174196 |
Implement for mobile phone |
Feb. 6, 2007 |
| 7162047 |
Audio reproducing apparatus |
Jan. 9, 2007 |
| 7151910 |
Wireless microphone information displaying apparatus and method thereof |
Dec. 19, 2006 |
| 7149551 |
Wireless headset capable of automatic link connection and method for controlling the same |
Dec. 12, 2006 |
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