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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:

Class Number Class Name Patents
381/184 Different types of diaphragms 59
381/185 Having common voice coil 9
381/370 Headphone 468
381/186 Plural diaphragms 205


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8712084 Motor assembly Apr. 29, 2014
8682008 Speaker assembly Mar. 25, 2014
8675899 Front surround system and method for processing signal using speaker array Mar. 18, 2014
8670580 Electronic device Mar. 11, 2014
8670585 Spherical sound source for acoustic measurements Mar. 11, 2014
8660279 Nested compound loudspeaker drive unit Feb. 25, 2014
8660288 Twin driver earphone Feb. 25, 2014
8638957 Sound reproduction apparatus and a method for speaker charging/calibration employed in said apparatus Jan. 28, 2014
8634586 Ceiling-mounted loudspeaker enclosure Jan. 21, 2014
8594358 Passive acoustical radiating Nov. 26, 2013
8590136 Method of fabricating a dual single-crystal backplate microphone Nov. 26, 2013
8571240 System and method for reducing baffle vibration Oct. 29, 2013
8539913 Wearable sound system for animals Sep. 24, 2013
8538046 Speaker set and electronic device incorporating the same Sep. 17, 2013
8538047 Digital sound projector Sep. 17, 2013
8526662 Articulating speaker assembly providing for pivotal adjustment of connected first and second members Sep. 3, 2013
8520883 Articulating speaker assembly providing for pivotal adjustment of connected first and second midrange members Aug. 27, 2013
8516681 Loud speaker manufacturing method Aug. 27, 2013
8503690 Loudspeaker unit Aug. 6, 2013
8488816 Electro-acoustic transducer with multi-faced diaphragm assembly Jul. 16, 2013
8472649 Push-pull type speaker device and method of manufacturing the same Jun. 25, 2013
8467557 Coaxial speaker system with improved transition between individual speakers Jun. 18, 2013
8452032 Nested compound loudspeaker drive unit May. 28, 2013
8428293 Speaker device Apr. 23, 2013
8422721 Sound reproduction systems and method for arranging transducers therein Apr. 16, 2013
8422713 Spherically housed loudspeaker system Apr. 16, 2013
8416971 Loudspeaker driver Apr. 9, 2013
8391519 Treble bass coaxial loudspeaker Mar. 5, 2013
8391516 Method of using an audio device for improving sound reproduction and listening enjoyment Mar. 5, 2013
8385568 Low-profile speaker arrangements for compact electronic devices Feb. 26, 2013
8374595 Handheld electronic device and operating method thereof Feb. 12, 2013
8370164 Apparatus and method for coding and decoding multi-object audio signal with various channel including information bitstream conversion Feb. 5, 2013
8335338 Speaker and electronic apparatus and device using the same Dec. 18, 2012
8320596 Array speaker system and array microphone system Nov. 27, 2012
8311261 Acoustic transducer array Nov. 13, 2012
8300871 Earphone for wideband communication Oct. 30, 2012
8290605 Acoustic design support apparatus Oct. 16, 2012
8284976 Sound reproduction with improved performance characteristics Oct. 9, 2012
8284977 Multi chamber ported stereo speaker Oct. 9, 2012
8280063 Loudspeaker panel with a microphone and method for using both Oct. 2, 2012
8254604 Array speaker system and method of implementing the same Aug. 28, 2012
8249289 Electronic apparatus of splittable type Aug. 21, 2012
8249286 Interconnecting earphones Aug. 21, 2012
8249282 Speaker assembly Aug. 21, 2012
8243963 Swivel tweeter mechanism for a constant phase coaxial acoustic transducer Aug. 14, 2012
8238572 Speaker device of mobile communication terminal for outputting high quality sound Aug. 7, 2012
8238588 Loudspeaker system and method for producing synthesized directional sound beam Aug. 7, 2012
8229155 Speaker assembly with directional adjustability Jul. 24, 2012
8229141 Dense transducer array and method Jul. 24, 2012
8223592 Omni-directional acoustic radiator with radial waveguides for submersible multi-transducer array Jul. 17, 2012

1 2 3 4 5 6 7










 
 
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