CAPACITIVE TRANSDUCER

PROBLEM TO BE SOLVED: To improve stick resistance and breakage resistance in a capacitive transducer including a plurality of sensing parts.SOLUTION: A diaphragm 33 is divided by a slit 37, such that a first diaphragm 33a and a second diaphragm 33b of which the area is smaller than that of the first...

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Bibliographic Details
Main Author OKUGAWA AKIHIRO
Format Patent
LanguageEnglish
Japanese
Published 05.10.2015
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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Summary:PROBLEM TO BE SOLVED: To improve stick resistance and breakage resistance in a capacitive transducer including a plurality of sensing parts.SOLUTION: A diaphragm 33 is divided by a slit 37, such that a first diaphragm 33a and a second diaphragm 33b of which the area is smaller than that of the first diaphragm 33a, are formed. A first stationary electrode plate 39a opposes the first diaphragm 33a, and a first acoustic sensing part 43a of low volume and high sensitivity is formed. A second stationary electrode plate 39b opposes the second diaphragm 33b, and a second acoustic sensing part 43b of high volume and low sensitivity is formed. From a back plate 38 holding the diaphragms 33a and 33b, a stopper 45a with a relatively short protrusion length protrudes towards the first diaphragm 33a, and a stopper 45b with a relatively long protrusion length protrudes towards the second diaphragm 33b. 【課題】複数のセンシング部を有する静電容量型トランスデューサにおいて、スティック耐性と破損耐性を高める。【解決手段】ダイアフラム３３をスリット３７で分割することにより、第１ダイアフラム３３ａと、第１ダイアフラム３３ａよりも面積の小さな第２ダイアフラム３３ｂとを形成する。第１ダイアフラム３３ａには第１固定電極板３９ａが対向し、小音量・高感度の第１音響センシング部４３ａが構成される。第２ダイアフラム３３ｂには第２固定電極板３９ｂが対向し、大音量・低感度の第２音響センシング部４３ｂが構成される。ダイアフラム３３ａ、３３ｂを保持するバックプレート３８からは、第１ダイアフラム３３ａに向けて突出長が比較的短いストッパ４５ａが突出しており、第２ダイアフラム３３ｂに向けて突出長が比較的長いストッパ４５ｂが突出している。【選択図】図４
Bibliography:Application Number: JP20140052134