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63. 发明专利

JPH057397A ELECTROSTATIC TYPE CONVERTER 失效
公开(公告)号：JPH057397A
公开(公告)日：1993-01-14
申请号：JP1783691
申请日：1991-02-08
申请人： AKG AKUSTISCHE KINO GERAETE
发明人： BUERUNAA FUIDEI
IPC分类号： H04R19/04 , H04R19/00
摘要： PURPOSE: To prevent the trouble between a diaphragm and a counter electrode, namely dew condensation in an insulating section or to prevent it from becoming conductive, at least. CONSTITUTION: An electric insulating member 3 has, as a whole or at least partially, at least 1/3 of the volume heat capacity and at least 10 time the heat conductivity compared to at least the counter electrode 2 and a casing 6 enveloping a converter.

64. 发明专利

JPH03148997A MICROPHONE DEVICE 失效
公开(公告)号：JPH03148997A
公开(公告)日：1991-06-25
申请号：JP19642090
申请日：1990-07-26
申请人： AKG AKUSTISCHE KINO GERAETE
发明人： YOOZEFU BURUTSUAA , KONRAATO BUORUFU
IPC分类号： G01S7/527 , G01S7/536 , H04R1/40 , H04R3/00
摘要： PURPOSE: To eliminate affecting a recording medium by a noise caused by the wind by utilizing microphones electronic circuits are postpositively connected thereto respectively, continuously measuring the air pressure during the sound recording, and selecting the most senseless microphone against a wind noise among plural individual microphones adjacently aligned. CONSTITUTION: The flow of the air generated by the microphone Mw for measuring the wind pressure and a voltage proportional to a sound pressure equivalent to the wind are amplified by a prepositioned amplifier 4, and filtered in a low- pass filter 5 into the frequency component approximately >=250Hz. Then, the wind strength in the microphone Mw is detected in a detector 12, and switches 6, 7 and 8 are turned on in a logic evaluating part 11 each time. The switches connects the most senseless microphones M1, M2 or Mn against the strength of the generated wind to the amplifier each time, respectively. Here, the separated microphones M1, M2 and Mn are a pressure microphone and/or a pressure- gradient microphone and/or a tube directivity microphone adjacently aligned.

65. 发明专利

JPH0362700A CONDUCTIVE SUPPORT MADE OF SYNTHETIC RESIN FOR COUNTER ELECTRODES OF CAPACITOR MICROPHONE 失效
公开(公告)号：JPH0362700A
公开(公告)日：1991-03-18
申请号：JP20157590
申请日：1990-07-31
申请人： AKG AKUSTISCHE KINO GERAETE
发明人： RIHIYARUTO PURIBIIRU , MANFUREETO DOIBERU
IPC分类号： H04R19/01 , H04R19/04
摘要： PURPOSE: To reduce the cost by using the end of a connection stud arranged in the center of the bottom part of a support as a connecting pin so as to form a conductive support for the opposed electrodes of a capacitor microphone by single injection molding. CONSTITUTION: An A1 thin layer is added to the flat plate end surface of a conductive alloyed resin support 1 obtained by injection molding, and an electret layer 3 consisting of a thin film of teflon FFP is mounted to a surface. A hole 2 is useful for acoustically connecting a space behind a vibration diaphragm (not shown in Fig.) with an opening communication from another acoustic space or a microphone capsule to the outside. The end of the connecting stud 5 integrally molded with the support 1 is machined into a pin to be electrically connected with a corresponding element. By this constitution, opposed electrodes are electrically connected to a preamplifier on a printed board by an extremely simple system.

66. 发明专利

JPH02165799A ELECTRIC ACOUSTIC SYSTEM 失效
公开(公告)号：JPH02165799A
公开(公告)日：1990-06-26
申请号：JP27511589
申请日：1989-10-24
申请人： AKG AKUSTISCHE KINO GERAETE
发明人： BUERUNAA FUIDEI
IPC分类号： H04R27/00 , H04S1/00
摘要： PURPOSE: To make it possible to determine the direction of a sound image by supplying a 2nd signal delayed from a primary signal from a sound source arranged on the opposite side of a primary sound source on a line connecting between the primary sound source and a hearer. CONSTITUTION: A hearer H receives the supply of an audio signal 4 from a left direction, e.g. from a speaker L1 , by both ears. A 2nd signal 5 timewisely delayed so as to obtain a unique hearing sense in a sound image direction is timewisely delayed and transmitted from a sound source, e.g. a speaker L2 , additionally arranged on the opposite side of the primary sound source to the hearer H. In this case, an angular area p of about ±50 deg. is formed on both the sides of a medium face 6. Consequently a sound direction is uniquely determined.

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