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41. 发明专利

DK0664942T3 未知
公开(公告)号：DK0664942T3
公开(公告)日：1997-07-28
申请号：DK93921550
申请日：1993-09-14
申请人： KNOWLES ELECTRONICS INC
发明人： HOLESHA KENNETH G
IPC分类号： H04R25/00 , H04R1/28
摘要： A microphone for a hearing aid having a modified high frequency response is disclosed. The hearing aid comprises a hollow housing having an upper wall, a lower wall and a depending wall disposed between the upper wall and the lower wall. The upper, lower and depending walls define a main chamber. The microphone further comprises an inlet tube extending outwardly from the depending wall for receiving sound and a diaphragm in continuous peripheral contact with the depending wall for substantially entirely dividing the main chamber into an input chamber in communicating relationship with the inlet tube and an output chamber. The input chamber presents an effective inertance to sound entering via the inlet tube. A structure is disposed within the input chamber between the diaphragm and the upper wall forming an elongated sound path. The elongated sound path increases the effective inertance of the input chamber to thereby lower the frequency of the peak response of the microphone to a frequency lower than the frequency of the peak response of a conventional receiver coupled thereto, to eliminate high frequency oscillations.

42. 发明专利

DE69303705T2 未知
公开(公告)号：DE69303705T2
公开(公告)日：1996-11-28
申请号：DE69303705
申请日：1993-02-03
申请人： KNOWLES ELECTRONICS INC
发明人： LENZINI ERNEST , WICKSTROM TIMOTHY
IPC分类号： H04R19/00 , H04R19/04 , H04R31/00

43. 发明专利

DE69304539D1 未知
公开(公告)号：DE69304539D1
公开(公告)日：1996-10-10
申请号：DE69304539
申请日：1993-02-16
申请人： KNOWLES ELECTRONICS INC
发明人： MARREN THOMAS F , LONGWELL THOMAS
IPC分类号： H04R1/00 , H04R1/10 , H04R1/44 , H04R11/00 , H04R25/00
摘要： An immersion-resistant housing adapted to receive a vibratable diaphragm spanning the interior of the housing to divide the housing into first and second chambers includes a first port communicating between the first chamber and the exterior environment. The first port is configured as a tubulation. A second port communicates between the second chamber and the external environment. The tubulation has sufficiently small diameter that water entering therein moves essentially as a piston without breakup. The tubulation is configured to have a volume at least equal to that of the first chamber, and a hydrostatic head of about 32 feet of water is necessary before water can be forced into the first chamber. In the preferred embodiment the diaphragm completely seals the housing against direct communication between the two chambers. Pressure equalization across the diaphragm under conditions of varying atmospheric pressure is achieved by a selective sealing system permitting passage of air through the second port while preventing the passage of water therethrough at pressures up to at least three and preferably ten meters of hydrostatic head.

44. 发明专利

AU2697695A Acoustic transducer 未知
公开(公告)号：AU2697695A
公开(公告)日：1996-01-04
申请号：AU2697695
申请日：1995-06-05
申请人： KNOWLES ELECTRONICS INC
发明人： RING EUGENE M , MURPHY WILLIAM J
IPC分类号： H04R19/01 , H04R25/00

45. 发明专利

DK0424916T3 未知
公开(公告)号：DK0424916T3
公开(公告)日：1995-11-20
申请号：DK90120418
申请日：1990-10-24
申请人： KNOWLES ELECTRONICS INC
发明人： CARLSON ELMER V
IPC分类号： H04R1/00 , H04R11/00 , H04R11/02 , H04R11/04 , H04R11/06 , H04R25/00 , H05K9/00
摘要： An electromagnetic transducer including a diaphragm (36) mechanically connected to an armature(24), a coil (27) wound transversely around the armature, a permanent magnet (29, 31) adjacent the armature, and one or more additional magnetic members completing a magnetic circuit having a plane of symmetry longitudinally bisecting the armature, has a magnetic shield (23) formed by two high-permeability casing halves joined together along a joint plane substantially concident with the plane of symmetry.

46. 发明专利

AU2197195A Mos circuit with dynamically reduced threshold voltage, as for use in an output buffer of a hearing aid amplifier 未知
公开(公告)号：AU2197195A
公开(公告)日：1995-10-17
申请号：AU2197195
申请日：1995-03-27
申请人： KNOWLES ELECTRONICS INC
发明人： BOOR STEVEN E
IPC分类号： G05F3/24 , H04R25/00
摘要： A buffer circuit, such as for use with a low voltage hearing aid, is disclosed. The hearing aid comprises a microphone, a receiver and an amplifier. The amplifier is disposed between the microphone and the receiver. The buffer circuit has a MOS device including a well terminal and a gate terminal equipotentially coupled together to reduce the effective threshold voltage of the MOS device, thereby reducing the gate-to-source voltage of the MOS device. This permits a greater linear output signal range for the amplifier.

47. 发明专利

DE69108090T2 未知
公开(公告)号：DE69108090T2
公开(公告)日：1995-10-05
申请号：DE69108090
申请日：1991-04-29
申请人： KNOWLES ELECTRONICS INC
发明人： CARLSON ELMER V
IPC分类号： H04R1/22 , H04R11/00 , H04R25/00 , H04R25/02
摘要： An improved high-frequency characteristic is achieved, in an otherwise conventional hearing aid receiver transducer by connecting each of the acoustic chambers (41,42) on the two sides of the receiver diaphragm (34), in the receiver housing (29), directly through an outlet port (31,32) and a sound transmission tube (61,62) coupled into the ear canal (64) of the hearing aid user; phase reversals due to resonances in the receiving acoustic chambers and tubes produce a high pass band in the output of the receiver as applied to the user's ear. An acoustically transparent contamination stop (65) prevents contaminants (e.g. cerumen) from reaching the transducer motor (40) but does not interfere with acoustic performance.

48. 发明专利

AU1928395A Miniaturized acoustic hearing aid module for emplacement completely within an ear canal 未知
公开(公告)号：AU1928395A
公开(公告)日：1995-09-04
申请号：AU1928395
申请日：1995-02-22
申请人： KNOWLES ELECTRONICS INC
发明人： CARLSON ELMER V , DAYTON PAUL C , KIRCHHOEFER DENNIS R , LENZINI ERNEST L , MITCHELL FRANK R , PETERS RICHARD
IPC分类号： H04R25/02
摘要： Miniaturized acoustic modules for a hearing aid adapted for emplacement completely within a human ear canal are disclosed.

49. 发明专利

DE69108090D1 未知
公开(公告)号：DE69108090D1
公开(公告)日：1995-04-20
申请号：DE69108090
申请日：1991-04-29
申请人： KNOWLES ELECTRONICS INC
发明人： CARLSON ELMER V
IPC分类号： H04R1/22 , H04R11/00 , H04R25/00 , H04R25/02
摘要： An improved high-frequency characteristic is achieved, in an otherwise conventional hearing aid receiver transducer by connecting each of the acoustic chambers (41,42) on the two sides of the receiver diaphragm (34), in the receiver housing (29), directly through an outlet port (31,32) and a sound transmission tube (61,62) coupled into the ear canal (64) of the hearing aid user; phase reversals due to resonances in the receiving acoustic chambers and tubes produce a high pass band in the output of the receiver as applied to the user's ear. An acoustically transparent contamination stop (65) prevents contaminants (e.g. cerumen) from reaching the transducer motor (40) but does not interfere with acoustic performance.

50. 发明专利

DE68917891D1 未知
公开(公告)号：DE68917891D1
公开(公告)日：1994-10-06
申请号：DE68917891
申请日：1989-06-08
申请人： KNOWLES ELECTRONICS INC
发明人： CARLSON ELMER V
IPC分类号： A61F11/00 , H04R1/10 , H04R25/00 , H04R25/02

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