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Class Information
Number: 381/191
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having electrostatic element (e.g., electret, vibrating plate)
Description: Subject matter including either a capacitor with a vibratable plate, or an element which has a spontaneous electrical field, one of which is caused to vibrate by an audio signal or incident sound.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7412065 |
Acoustic transducer with folded diaphragm |
Aug. 12, 2008 |
| 7408283 |
Micromachined ultrasonic transducer cells having compliant support structure |
Aug. 5, 2008 |
| 7386136 |
Sound detecting mechanism |
Jun. 10, 2008 |
| 7376239 |
Electromechanical transducer and method for transforming energies |
May. 20, 2008 |
| 7352876 |
Method and apparatus for substantially improving power supply rejection performance in a miniature microphone assembly |
Apr. 1, 2008 |
| 7352873 |
Electret-condenser microphone |
Apr. 1, 2008 |
| 7343661 |
Method for making condenser microphones |
Mar. 18, 2008 |
| 7346178 |
Backplateless silicon microphone |
Mar. 18, 2008 |
| 7327851 |
Parallelepiped condenser microphone |
Feb. 5, 2008 |
| 7316290 |
Acoustic lens system |
Jan. 8, 2008 |
| 7316289 |
Electro-acoustic transducer and method of manufacturing transducer |
Jan. 8, 2008 |
| 7317234 |
Means of integrating a microphone in a standard integrated circuit process |
Jan. 8, 2008 |
| 7308750 |
Method of manufacturing a magnesium diaphragm |
Dec. 18, 2007 |
| 7305750 |
Method of assembling a loudspeaker |
Dec. 11, 2007 |
| 7305096 |
Dynamic pressure sensing structure |
Dec. 4, 2007 |
| 7302077 |
Electromagnetic driver for a planar diaphragm loudspeaker |
Nov. 27, 2007 |
| 7289638 |
Electroacoustic microphone |
Oct. 30, 2007 |
| 7287327 |
Electret capacitor microphone and method for producing the same |
Oct. 30, 2007 |
| 7286680 |
Cylindrical microphone having an electret assembly in the end cover |
Oct. 23, 2007 |
| 7260230 |
High performance microphone and manufacturing method thereof |
Aug. 21, 2007 |
| 7233674 |
Integrated base and electret condenser microphone using the same |
Jun. 19, 2007 |
| 7227966 |
Piezo-electric speaker |
Jun. 5, 2007 |
| 7218742 |
Condenser microphone assembly |
May. 15, 2007 |
| 7216417 |
Method for manufacturing an electromechanical sensor element |
May. 15, 2007 |
| 7210213 |
Method for manufacturing a dynamic speaker |
May. 1, 2007 |
| 7184563 |
Electret condenser microphone |
Feb. 27, 2007 |
| 7177434 |
Stepped sound producing module |
Feb. 13, 2007 |
| 7171012 |
Microphone |
Jan. 30, 2007 |
| 7158651 |
Electromagnetic driver for a planar diaphragm loudspeaker |
Jan. 2, 2007 |
| 7158646 |
Signal derived bias supply for electrostatic loudspeakers |
Jan. 2, 2007 |
| 7152299 |
Method of assembling a loudspeaker |
Dec. 26, 2006 |
| 7136496 |
Electret assembly for a microphone having a backplate with improved charge stability |
Nov. 14, 2006 |
| 7136500 |
Electret condenser microphone |
Nov. 14, 2006 |
| 7132307 |
High performance silicon condenser microphone with perforated single crystal silicon backplate |
Nov. 7, 2006 |
| 7107665 |
Method for manufacturing microphone assembly |
Sep. 19, 2006 |
| 7106869 |
Condenser microphone |
Sep. 12, 2006 |
| 7095864 |
Electrostatic audio loudspeakers |
Aug. 22, 2006 |
| 7088837 |
High efficiency planar magnetic transducer with angled magnet structure |
Aug. 8, 2006 |
| 7072479 |
Capacitor microphone |
Jul. 4, 2006 |
| 7062058 |
Cylindrical microphone having an electret assembly in the end cover |
Jun. 13, 2006 |
| 7062055 |
Elastomeric dielectric polymer film sonic actuator |
Jun. 13, 2006 |
| 7062052 |
Electret condenser microphone and method of producing same |
Jun. 13, 2006 |
| 7054456 |
Invertedly driven electrostatic speaker |
May. 30, 2006 |
| 7043035 |
Miniature microphone |
May. 9, 2006 |
| 7031480 |
Electret condenser microphone |
Apr. 18, 2006 |
| 6996891 |
Method for the manufacture of a sensor element |
Feb. 14, 2006 |
| 6999596 |
Capacitor sensor |
Feb. 14, 2006 |
| 6987859 |
Raised microstructure of silicon based device |
Jan. 17, 2006 |
| 6985597 |
Variable directional capacitor microphone comprising elastic acoustic resisting member |
Jan. 10, 2006 |
| 6978029 |
Condenser microphone apparatus and its connecting apparatus |
Dec. 20, 2005 |
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