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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) 236
381/165 By modifying fluid flow 34
381/162 Detail of mechanical vibration coupling to transducer (e.g., tuned vibrating element) 82
381/152 Driven diverse static structure (e.g., wall, sounding board) 273
381/396 Electromagnetic (e.g., dyynamic) 460
381/190 Electrostrictive, magnetostrictive, or piezoelectric 432
381/166 Having a fluid as a conducting element 9
381/337 Having acoustic wave modifying structure 168
381/163 Having bi-directional transducer 53
381/385 Having body supported structure other than on head 140
381/191 Having electrostatic element (e.g., electret, vibrating plate) 499
381/189 Having protective or sheilding feature 227
381/355 Housed microphone 386
381/369 Microphone capsule only 180
381/386 Mounting or support feature of housed loudspeaker 734
381/182 Plural or compound reproducers 325
381/164 Thermal response to, or generation of, sound vibration 71
381/161 With mechanical amplifier arrangement 26


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8666097 Electrostatic speaker Mar. 4, 2014
8644529 Fully differential low-noise capacitor microphone circuit Feb. 4, 2014
8644544 Dynamic microphone unit and dynamic microphone Feb. 4, 2014
8634579 Thermoacoustic device Jan. 21, 2014
8630429 Preventing electrostatic pull-in in capacitive devices Jan. 14, 2014
8605920 Condenser microphone having flexure hinge diaphragm and method of manufacturing the same Dec. 10, 2013
8605936 In-wall loudspeaker mounting method and apparatus Dec. 10, 2013
8600096 Surface treatment for ear tips Dec. 3, 2013
8594350 Set-up method for array-type sound system Nov. 26, 2013
8594349 Flat speaker structure Nov. 26, 2013
8588435 Microphone Nov. 19, 2013
8559659 Control of audio output state based on wireless charging Oct. 15, 2013
8553911 Diaphragm of MEMS electroacoustic transducer Oct. 8, 2013
8548181 Inflatable ear mold connection system Oct. 1, 2013
8538057 Highly directional microphone Sep. 17, 2013
8526643 Speaker Sep. 3, 2013
8520876 Assembly structure for speaker system Aug. 27, 2013
8509455 Multiple-use acoustic port Aug. 13, 2013
8509461 Bone conduction devices generating tangentially-directed mechanical force using a rotationally moving mass Aug. 13, 2013
8503699 Plate, transducer and methods for making and operating a transducer Aug. 6, 2013
8498441 Electronic device Jul. 30, 2013
8494176 Information providing system Jul. 23, 2013
8494184 Digital data transfer via audio signal conductors Jul. 23, 2013
8494185 Electro-acoustic transducer tuning and data storage Jul. 23, 2013
8479872 Ring shaped membrane for an electro-acoustical loudspeaker Jul. 9, 2013
8477968 Thermal acoustic speaker Jul. 2, 2013
8472659 Multimode audio reproduction device Jun. 25, 2013
8447053 Flat speaker apparatus with heat dissipating structure and method for heat dissipation of flat speaker May. 21, 2013
8422702 Condenser microphone having flexure hinge diaphragm and method of manufacturing the same Apr. 16, 2013
8391515 Micro-speaker Mar. 5, 2013
8368153 Wafer level package of MEMS microphone and manufacturing method thereof Feb. 5, 2013
8369543 Speaker device and speaker-excitation method Feb. 5, 2013
8369545 Flexible luminescent electro-acoustic transducer and electronic device using the same Feb. 5, 2013
8345895 Diaphragm of MEMS electroacoustic transducer Jan. 1, 2013
8300876 Micro-speaker and method for manufacturing same Oct. 30, 2012
8290179 Multiple-use acoustic port Oct. 16, 2012
8284964 Compound membrane, method of manufacturing the same, and acoustic device Oct. 9, 2012
8280081 Electrode connection structure of speaker unit Oct. 2, 2012
8265307 Acoustic transducer Sep. 11, 2012
8265306 Digital microphone and power supply unit for a digital microphone Sep. 11, 2012
8264349 Time for ear pill intake determined by noise dosimetry in wearable devices Sep. 11, 2012
8247930 Acoustic exciter and speaker using it Aug. 21, 2012
8233641 Method and topology to switch an output stage in a class ab audio amplifier for wireless applications Jul. 31, 2012
8233646 Acoustic device and method of manufacturing same Jul. 31, 2012
8229139 MEMS microphone, production method and method for installing Jul. 24, 2012
8229142 Devices and systems including transducers Jul. 24, 2012
8208679 Transducer membrane with symmetrical curvature Jun. 26, 2012
8204241 Sound outputting apparatus, sound outputting method, sound output processing program and sound outputting system Jun. 19, 2012
8165335 Speaker and speaker unit Apr. 24, 2012
8160285 Waveguide unit Apr. 17, 2012

1 2 3 4










 
 
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