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Class Information
Number: 381/182
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Plural or compound reproducers
Description: Subject matter having a plurality of sound producing transducer having two or more elements performing the same or similar functions.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7577265 |
Loudspeaker system providing improved sound presence and frequency response in mid and high frequency ranges |
Aug. 18, 2009 |
| 7575095 |
Speaker |
Aug. 18, 2009 |
| 7567680 |
Dual-diaphragm speaker assemblies with acoustic passageways and mobile terminals including the same |
Jul. 28, 2009 |
| 7551746 |
Drive unit for electro-acoustic converter with radially magnetized permanent magnetic bars |
Jun. 23, 2009 |
| 7539318 |
Speaker unit, method for fabricating the same, and speaker apparatus |
May. 26, 2009 |
| 7515723 |
Electro-acoustic converter with demountable diaphragm and voice coil assembly |
Apr. 7, 2009 |
| 7515724 |
Loudspeaker driver |
Apr. 7, 2009 |
| 7499555 |
Personal communication method and apparatus with acoustic stray field cancellation |
Mar. 3, 2009 |
| 7460679 |
Flat panel speaker system with a coated diaphragm |
Dec. 2, 2008 |
| 7426278 |
Sound device provided with a geometric and electronic radiation control |
Sep. 16, 2008 |
| 7418104 |
Speaker system |
Aug. 26, 2008 |
| 7415124 |
Low frequency surface array |
Aug. 19, 2008 |
| 7386137 |
Sound transducer for solid surfaces |
Jun. 10, 2008 |
| 7379554 |
Drive unit for electro-acoustic converter with dual magnetic circuits sharing permanent magnet |
May. 27, 2008 |
| 7324834 |
Speaker system |
Jan. 29, 2008 |
| 7324657 |
Speaker apparatus |
Jan. 29, 2008 |
| 7319767 |
Line array electroacoustical transducing |
Jan. 15, 2008 |
| 7305750 |
Method of assembling a loudspeaker |
Dec. 11, 2007 |
| 7302076 |
Low profile speaker and system |
Nov. 27, 2007 |
| 7298862 |
Asymmetrical loudspeaker enclosures with enhanced low frequency response |
Nov. 20, 2007 |
| 7280667 |
Speaker system |
Oct. 9, 2007 |
| 7277552 |
Increased LF spectrum power density loudspeaker system |
Oct. 2, 2007 |
| 7260235 |
Line electroacoustical transducing |
Aug. 21, 2007 |
| 7260228 |
Optimum driver spacing for a line array with a minimum number of radiating elements |
Aug. 21, 2007 |
| 7242785 |
Portable powered speaker |
Jul. 10, 2007 |
| 7210213 |
Method for manufacturing a dynamic speaker |
May. 1, 2007 |
| 7201251 |
Modular speaker cabinet |
Apr. 10, 2007 |
| 7194098 |
Acoustic device |
Mar. 20, 2007 |
| 7194099 |
Handheld electronics devices with multiple user sensory transducers and methods |
Mar. 20, 2007 |
| 7171013 |
Loud speaker |
Jan. 30, 2007 |
| 7162050 |
Compound sound generator |
Jan. 9, 2007 |
| 7142686 |
Compound sound generator |
Nov. 28, 2006 |
| 7142680 |
Multiple waveguide coaxial ceiling loudspeaker |
Nov. 28, 2006 |
| 7133533 |
Passive acoustic radiating |
Nov. 7, 2006 |
| 7130441 |
Speaker system having processing circuitry |
Oct. 31, 2006 |
| 7120264 |
Sound reproducing apparatus |
Oct. 10, 2006 |
| 7106878 |
Speaker and mobile terminal device |
Sep. 12, 2006 |
| 7099489 |
Twin magnetic loop multifunctional vibrator-speaker transducer |
Aug. 29, 2006 |
| 7095863 |
Panel form loudspeaker |
Aug. 22, 2006 |
| 7082208 |
Speaker assembly having plural drivers |
Jul. 25, 2006 |
| 7062054 |
Speaker device |
Jun. 13, 2006 |
| 7062064 |
Flat panel loudspeaker arrangement |
Jun. 13, 2006 |
| 7046816 |
Coincident source stereo speaker |
May. 16, 2006 |
| 6999597 |
Speaker stacking structure |
Feb. 14, 2006 |
| 6996243 |
Loudspeaker with shaped sound field |
Feb. 7, 2006 |
| 6985593 |
Baffle vibration reducing |
Jan. 10, 2006 |
| 6968067 |
Portable entertainment system |
Nov. 22, 2005 |
| 6963650 |
Coaxial speaker with step-down ledge to eliminate sound wave distortions and time delay |
Nov. 8, 2005 |
| 6961438 |
Loudspeaker system having wide-directional characteristics |
Nov. 1, 2005 |
| 6959096 |
Sound reproduction system |
Oct. 25, 2005 |
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