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Class Information
Number: 381/186
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Plural or compound reproducers > Plural diaphragms
Description: Subject matter including a speaker having plural flexible membranes, for radiating sound waves.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8670580 Electronic device Mar. 11, 2014
8670585 Spherical sound source for acoustic measurements Mar. 11, 2014
8587631 Facilitating communications using a portable communication device and directed sound output Nov. 19, 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
8515101 Bending vibration type sound transmitter Aug. 20, 2013
8515102 Line array loudspeaker Aug. 20, 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
8401209 Microphone having diaphragm ring with increased stability Mar. 19, 2013
8391519 Treble bass coaxial loudspeaker Mar. 5, 2013
8345883 Audio playback method and apparatus using line array speaker unit Jan. 1, 2013
8243963 Swivel tweeter mechanism for a constant phase coaxial acoustic transducer Aug. 14, 2012
8243966 Assembly structure of a flat speaker Aug. 14, 2012
8229155 Speaker assembly with directional adjustability Jul. 24, 2012
8224016 Electroacoustic transducer having multi-channel diaphragm and hearing aid using the same Jul. 17, 2012
8224001 Line array loudspeaker Jul. 17, 2012
8189847 Dual-frequency coaxial earphones with shared magnet May. 29, 2012
8175301 Loudspeaker driver May. 8, 2012
8139784 Compound loudspeaker Mar. 20, 2012
8135164 Speaker Mar. 13, 2012
8130986 Trapped fluid microsystems for acoustic sensing Mar. 6, 2012
8121316 Phase plug Feb. 21, 2012
8094842 Loudspeaker system and loudspeaker enclosure Jan. 10, 2012
8085966 Combined headphone set and portable speaker assembly Dec. 27, 2011
8077898 Dual-frequency coaxial earphones Dec. 13, 2011
8054997 Structure of speaker Nov. 8, 2011
8031897 System and method for reduced baffle vibration Oct. 4, 2011
8027493 Biplane line array speaker with arcuate tweeter array providing controlled directivity Sep. 27, 2011
8014545 Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch device Sep. 6, 2011
8009858 Loudspeaker Aug. 30, 2011
8009845 Microphone apparatus Aug. 30, 2011
7970158 Sound system Jun. 28, 2011
7912240 Dual diaphragm electroacoustic transducer Mar. 22, 2011
7894614 System and method for achieving extended low-frequency response in a loudspeaker system Feb. 22, 2011
7848533 Loudspeaker Dec. 7, 2010
7813516 System for cardioid sound field generation from dissimilar sources Oct. 12, 2010
7809148 Loudspeaker Oct. 5, 2010
7729499 Speaker apparatus and reproducing apparatus Jun. 1, 2010
7697710 Earphone with a sound guiding tube Apr. 13, 2010
7672472 Audio transducer Mar. 2, 2010
7668331 Fidelity speaker Feb. 23, 2010
7570774 Speaker having improved sound-radiating function to both directions Aug. 4, 2009
7555133 Electro-acoustic transducer Jun. 30, 2009
7551749 Baffle vibration reducing Jun. 23, 2009
7539318 Speaker unit, method for fabricating the same, and speaker apparatus May. 26, 2009
7519191 Loudspeaker, manufacturing method thereof, and mobile telephone using the same Apr. 14, 2009
7515723 Electro-acoustic converter with demountable diaphragm and voice coil assembly Apr. 7, 2009
7502485 Loudspeaker, loudspeaker module, and electronic equipment using the loudspeaker module Mar. 10, 2009

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