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Class Information
Number: 381/150
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer
Description: Subject matter having a structure or process for converting an information signal between audible sound vibrations and a corresponding time-varying electrical quantity.
Sub-classes under this class:
| Class Number |
Class Name |
Patents |
| 381/151 |
Body contact wave transfer (e.g., bone conduction earphone, larynx microphone) |
136 |
| 381/165 |
By modifying fluid flow |
29 |
| 381/162 |
Detail of mechanical vibration coupling to transducer (e.g., tuned vibrating element) |
58 |
| 381/152 |
Driven diverse static structure (e.g., wall, sounding board) |
193 |
| 381/396 |
Electromagnetic (e.g., dyynamic) |
283 |
| 381/190 |
Electrostrictive, magnetostrictive, or piezoelectric |
322 |
| 381/166 |
Having a fluid as a conducting element |
4 |
| 381/337 |
Having acoustic wave modifying structure |
87 |
| 381/163 |
Having bi-directional transducer |
41 |
| 381/385 |
Having body supported structure other than on head |
115 |
| 381/191 |
Having electrostatic element (e.g., electret, vibrating plate) |
338 |
| 381/189 |
Having protective or sheilding feature |
139 |
| 381/355 |
Housed microphone |
192 |
| 381/369 |
Microphone capsule only |
65 |
| 381/386 |
Mounting or support feature of housed loudspeaker |
447 |
| 381/182 |
Plural or compound reproducers |
228 |
| 381/164 |
Thermal response to, or generation of, sound vibration |
11 |
| 381/161 |
With mechanical amplifier arrangement |
18 |
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7583808 |
Locating and tracking acoustic sources with microphone arrays |
Sep. 1, 2009 |
| 7567848 |
Speaker apparatus and a computer system incorporating same |
Jul. 28, 2009 |
| 7561704 |
Structure of speaker |
Jul. 14, 2009 |
| 7542579 |
Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer |
Jun. 2, 2009 |
| 7539525 |
Wireless headset phone of ear-worn type |
May. 26, 2009 |
| 7539569 |
Method for operating a sensor in a safety system |
May. 26, 2009 |
| 7493049 |
Audio Optic Cable |
Feb. 17, 2009 |
| 7454024 |
System and method for design and fabrication of a high frequency transducer |
Nov. 18, 2008 |
| 7447328 |
Loudspeaker |
Nov. 4, 2008 |
| 7359523 |
Fluidic acoustic transducer |
Apr. 15, 2008 |
| 7227966 |
Piezo-electric speaker |
Jun. 5, 2007 |
| 7213917 |
Electronically enabled eyewear |
May. 8, 2007 |
| 7151836 |
Speaker apparatus and sound reproduction apparatus |
Dec. 19, 2006 |
| 7116790 |
Loudspeaker |
Oct. 3, 2006 |
| 7113813 |
Mobile communication terminal and electro-acoustic transducer used for the same |
Sep. 26, 2006 |
| 7058882 |
Audio data recording/reproducing apparatus and method |
Jun. 6, 2006 |
| 7027605 |
Mid-range loudspeaker |
Apr. 11, 2006 |
| 7004582 |
Electronically enabled eyewear |
Feb. 28, 2006 |
| 6973994 |
Apparatus for increasing the quality of sound from an acoustic source |
Dec. 13, 2005 |
| 6975735 |
Sound collecting device minimizing electrical noise |
Dec. 13, 2005 |
| 6944307 |
Microphone/earpiece device for a mobile telephone, telephone exchange or the like |
Sep. 13, 2005 |
| 6876743 |
One-piece speaker assembly |
Apr. 5, 2005 |
| 6812620 |
Micromachined capacitive electrical component |
Nov. 2, 2004 |
| 6683964 |
Direction finder |
Jan. 27, 2004 |
| 6617967 |
Piezoelectric siren driver circuit |
Sep. 9, 2003 |
| 6522759 |
Speaker |
Feb. 18, 2003 |
| 6518356 |
Functional dyes used as an indicator in aerobically hardening compositions |
Feb. 11, 2003 |
| 6504938 |
Dual-chamber loudspeaker |
Jan. 7, 2003 |
| 6445804 |
Ultra-directional speaker system and speaker system drive method |
Sep. 3, 2002 |
| 6418231 |
High back EMF, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround |
Jul. 9, 2002 |
| 6369312 |
Method for expressing vibratory music and apparatus therefor |
Apr. 9, 2002 |
| 6366675 |
Sound pressure detecting system |
Apr. 2, 2002 |
| 6312552 |
Curable resin composition, adhesive composition, bonded product, speaker and bonding method |
Nov. 6, 2001 |
| 6269318 |
Method for determining transducer linear operational parameters |
Jul. 31, 2001 |
| 6125189 |
Electroacoustic transducer of digital type |
Sep. 26, 2000 |
| 6058195 |
Adaptive controller for actuator systems |
May. 2, 2000 |
| 6052472 |
Multi-functional audio and video control box |
Apr. 18, 2000 |
| 6031919 |
Loudspeaker system and sound reproducing apparatus |
Feb. 29, 2000 |
| 6023515 |
Mass excited acoustic device |
Feb. 8, 2000 |
| 5995635 |
Sound pickup and amplifier apparatus for vibrating strings |
Nov. 30, 1999 |
| 5995637 |
Assembly housing for electroacoustical transducer |
Nov. 30, 1999 |
| 5973422 |
Low frequency vibrator |
Oct. 26, 1999 |
| 5937074 |
High back emf, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround |
Aug. 10, 1999 |
| 5895220 |
Audio frequency converter for audio-phonatory training |
Apr. 20, 1999 |
| 5853005 |
Acoustic monitoring system |
Dec. 29, 1998 |
| 5573403 |
Audio frequency converter for audio-phonatory training |
Nov. 12, 1996 |
| 5553220 |
Managing audio data using a graphics display controller |
Sep. 3, 1996 |
| 5546069 |
Taut armature resonant impulse transducer |
Aug. 13, 1996 |
| 5484969 |
High-volume acoustic transducer |
Jan. 16, 1996 |
| 5345427 |
Ultrasonic transducer |
Sep. 6, 1994 |
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