公开(公告)号：US1789554A

公开(公告)日：1931-01-20

申请号：US29188528

申请日：1928-07-11

申请人： UNITED REPRODUCERS PATENTS COR

发明人： COLIN KYLE

IPC分类号： H04R19/00

CPC分类号： H04R19/00

公开(公告)号：US1767656A

公开(公告)日：1930-06-24

申请号：US37935929

申请日：1929-07-19

申请人： EPHRAIM BANNING

发明人： EDELMAN PHILIP E

IPC分类号： H04R19/00

CPC分类号： H04R19/00

公开(公告)号：US1758777A

公开(公告)日：1930-05-13

申请号：US28610728

申请日：1928-06-18

申请人： GEN ELECTRIC

发明人： BARTON FREDERICK C

IPC分类号： H04R19/00 ,  H04R19/04

CPC分类号： H04R19/00 ,  H04R19/04

公开(公告)号：US1722347A

公开(公告)日：1929-07-30

申请号：US14279026

申请日：1926-10-20

申请人： BELL TELEPHONE LABOR INC

发明人： WENTE EDWARD C

IPC分类号： H04R19/00

CPC分类号： H04R19/00

公开(公告)号：US1708846A

公开(公告)日：1929-04-09

申请号：US27649028

申请日：1928-05-09

申请人： AUGUST SCHROEDER F

发明人： RICHARD NAGEL

IPC分类号： H04R19/00

CPC分类号： H04R19/00

公开(公告)号：US1631583A

公开(公告)日：1927-06-07

申请号：US8797426

申请日：1926-02-12

申请人： IGNATZ LAUTER

发明人： JOHN DEPEW

IPC分类号： H04R19/00

CPC分类号： H04R19/00

公开(公告)号：US20240187776A1

公开(公告)日：2024-06-06

申请号：US18440981

申请日：2024-02-14

申请人： Waves Audio Ltd.

发明人： Gabriel Zeltzer ,  Meir Shaashua

IPC分类号： H04R1/10 ,  G10K11/178 ,  H04R3/00 ,  H04R3/06 ,  H04R7/04 ,  H04R7/18 ,  H04R19/00 ,  H04R19/02 ,  H04R29/00

CPC分类号： H04R1/1041 ,  G10K11/17825 ,  G10K11/17827 ,  H04R1/1016 ,  H04R1/1025 ,  H04R1/1075 ,  H04R3/06 ,  H04R7/04 ,  H04R7/18 ,  H04R19/00 ,  H04R19/02 ,  H04R29/001 ,  G10K2210/3026 ,  H04R3/007 ,  H04R2430/01

摘要： Controlling operation of an electrostatic acoustic device including a membrane and an electrode disposed proximate to the membrane. A probe signal varying at radio frequency is injected into the electrode. A current or charge signal is detected by converting the current or charge signal to a modulated voltage signal. The current or charge signal includes an audio signal varying at audio frequencies modulating the radio frequency of the probe signal. The modulated voltage signal is demodulated to produce an audio output signal varying at audio frequency. The audio output signal is transformed to produce an error signal. A control signal is input to the electrostatic acoustic device responsive to the error signal. The control signal is configured to cancel at least in part a mechanical response of the membrane due to ambient noise.

公开(公告)号：US11750981B2

公开(公告)日：2023-09-05

申请号：US16595522

申请日：2019-10-08

申请人： Sumitomo Riko Company Limited

发明人： Katsuhiko Nakano ,  Masaki Nasu ,  Koichi Hasegawa ,  Shinya Tahara

IPC分类号： B06B1/02 ,  G01D5/241 ,  B60R21/015 ,  H04R19/00 ,  B62D1/04 ,  B62D1/06 ,  H10N30/857 ,  H10N30/87

CPC分类号： H04R19/00 ,  B60R21/01552 ,  B62D1/046 ,  B62D1/065 ,  H10N30/857 ,  H10N30/877

摘要： Provided is a transducer that can be manufactured without using a volatile adhesive or an organic solvent. A transducer is provided with: a first electrode sheet provided with a plurality of first through-holes; a dielectric layer, of which a first surface is disposed on the first-electrode-sheet side; and a first fusion-bonding layer formed from a fusion-bonding material, the first fusion-bonding layer joining together, by fusion bonding of the fusion-bonding material, a boundary region between a body portion of the dielectric layer and a first inner surface of the first electrode sheet and a boundary region between the body portion of the dielectric layer and a first inner circumferential surface of at least some of the plurality of first through-holes.

公开(公告)号：US09756430B2

公开(公告)日：2017-09-05

申请号：US15148375

申请日：2016-05-06

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Anthony Bernard Traynor ,  Richard Ian Laming ,  Tsjerk H. Hoekstra

IPC分类号： H01L29/84 ,  H04R19/04 ,  B81B3/00 ,  H01L27/00 ,  H04R19/00 ,  H04R31/00 ,  H04R23/00

CPC分类号： H04R19/04 ,  B81B3/0021 ,  B81B3/0072 ,  B81B3/0094 ,  B81B2201/00 ,  B81B2201/0235 ,  B81B2201/0257 ,  B81B2201/0264 ,  H01L27/00 ,  H04R19/00 ,  H04R19/005 ,  H04R23/00 ,  H04R31/00 ,  H04R2499/11

摘要： A method of fabricating a micro-electrical-mechanical system (MEMS) transducer comprises the steps of forming a membrane on a substrate, and forming a back-volume in the substrate. The step of forming a back-volume in the substrate comprises the steps of forming a first back-volume portion and a second back-volume portion, the first back-volume portion being separated from the second back-volume portion by a step in a sidewall of the back-volume. The cross-sectional area of the second back-volume portion can be made greater than the cross-sectional area of the membrane, thereby enabling the back-volume to be increased without being constrained by the cross-sectional area of the membrane. The back-volume may comprise a third back-volume portion. The third back-volume portion enables the effective diameter of the membrane to be formed more accurately.

公开(公告)号：US20170165715A1

公开(公告)日：2017-06-15

申请号：US15325492

申请日：2015-07-13

申请人： KONINKLIJKE PHILIPS N.V.

发明人： WOJTEK SUDOL ,  PETER DIRKSEN ,  VINCENT ADRIANUS HENNEKEN ,  RONALD DEKKER ,  MARCUS CORNELIS LOUWERSE

IPC分类号： B06B1/02 ,  G01N29/24 ,  B81C1/00

CPC分类号： B06B1/0292 ,  B81B2201/0292 ,  B81C1/00214 ,  G01N29/2406 ,  G01N29/262 ,  G01N2291/02475 ,  G01N2291/106 ,  H04R19/00

摘要： A large aperture CMUT transducer array is formed of a plurality of adjacently located tiles of CMUT cells. The adjacent edges of the tiles are formed by an anisotropic etch process, preferably a deep reactive ion etching process which is capable of cutting through the die and its substrate while maintaining vertical edges in close proximity to the CMUT cells at the edge of the tile. This enables the CMUT cells of continuous rows or columns to exhibit a constant pitch over multiple CMUT cell tiles. The tiles also contain interconnect electrodes along an edge for making electrical connections to the tiles with flex circuit.