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Class Information
Number: 381/347
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Acoustic enclosure > Acoustic resistance > On front side of diaphragm
Description: Subject matter in which an acoustic resistance is placed within a primary sound radiation path of a vibrating membrane of a transducer.










Patents under this class:

Patent Number Title Of Patent Date Issued
8515101 Bending vibration type sound transmitter Aug. 20, 2013
8509459 Noise cancelling microphone with reduced acoustic leakage Aug. 13, 2013
8467549 Audio information processing apparatus and audio information processing method Jun. 18, 2013
8422713 Spherically housed loudspeaker system Apr. 16, 2013
8139784 Compound loudspeaker Mar. 20, 2012
8135149 Wireless communication device Mar. 13, 2012
8130994 Waveguide Mar. 6, 2012
8111853 Dual mode earphone with acoustic equalization Feb. 7, 2012
8045722 Method of and apparatus for controlling sound field through array speaker Oct. 25, 2011
8036411 Portable communication tool Oct. 11, 2011
8027500 Narrow profile speaker configurations and systems Sep. 27, 2011
8005250 Microphone housing Aug. 23, 2011
7912238 Speaker attenuation system, method and apparatus Mar. 22, 2011
7885418 Acoustic actuator and passive attenuator incorporating a lightweight acoustic diaphragm with an ultra low resonant frequency coupled with a shallow enclosure of small volume Feb. 8, 2011
7851247 Method of fabricating micro-electromechanical system microphone structure Dec. 14, 2010
7668331 Fidelity speaker Feb. 23, 2010
7630491 Speaker enhancer and method of use Dec. 8, 2009
7466837 Diffuser and speaker using the same Dec. 16, 2008
7463746 Narrow opening electroacoustical transducing Dec. 9, 2008
7433483 Narrow profile speaker configurations and systems Oct. 7, 2008
7333626 Arbitrary coverage angle sound integrator Feb. 19, 2008
7324654 Arbitrary coverage angle sound integrator Jan. 29, 2008
7187105 Transducer with coupled vibrators Mar. 6, 2007
7155021 Loudspeaker having an acoustic panel and an electrical driver Dec. 26, 2006
7093688 Structure for preventing the generation of standing waves and a method for implementing the same Aug. 22, 2006
6574344 Directional horn speaker system Jun. 3, 2003
6470088 Vented loudspeaker enclosure with limited driver radiation Oct. 22, 2002
5119429 Audio installation, in particular stereophonic, for television sets with a large built-in low-frequency loudspeaker Jun. 2, 1992
5117463 Speaker system having directivity May. 26, 1992
5058154 Telephone handset having a pure acoustic resistance connection Oct. 15, 1991
4503564 Opto-acoustic transducer for a telephone receiver Mar. 5, 1985
4389542 Orthodynamic headphone Jun. 21, 1983
4292561 Attenuating means for electroacoustic transducer Sep. 29, 1981
4170720 AGC circuit particularly for a hearing aid Oct. 9, 1979
4163876 Electro-acoustic transducer with variable thickness foam surfaced diaphragm Aug. 7, 1979
4012605 Input/output transducer with damping arrangement Mar. 15, 1977
4008374 Loudspeaker systems Feb. 15, 1977
3944757 High-fidelity moving-coil loudspeaker Mar. 16, 1976











 
 
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