JPH0520956B2 - - Google Patents

Info

Publication number
JPH0520956B2
JPH0520956B2 JP3430688A JP3430688A JPH0520956B2 JP H0520956 B2 JPH0520956 B2 JP H0520956B2 JP 3430688 A JP3430688 A JP 3430688A JP 3430688 A JP3430688 A JP 3430688A JP H0520956 B2 JPH0520956 B2 JP H0520956B2
Authority
JP
Japan
Prior art keywords
piezoelectric
diaphragm
resonance frequency
frequency
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP3430688A
Other languages
English (en)
Japanese (ja)
Other versions
JPH01209899A (ja
Inventor
Hiroshi Mizukoshi
Masao Ooki
Yoshimasa Kamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP3430688A priority Critical patent/JPH01209899A/ja
Publication of JPH01209899A publication Critical patent/JPH01209899A/ja
Publication of JPH0520956B2 publication Critical patent/JPH0520956B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Piezo-Electric Transducers For Audible Bands (AREA)
JP3430688A 1988-02-17 1988-02-17 圧電型受話器 Granted JPH01209899A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3430688A JPH01209899A (ja) 1988-02-17 1988-02-17 圧電型受話器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3430688A JPH01209899A (ja) 1988-02-17 1988-02-17 圧電型受話器

Publications (2)

Publication Number Publication Date
JPH01209899A JPH01209899A (ja) 1989-08-23
JPH0520956B2 true JPH0520956B2 (en:Method) 1993-03-22

Family

ID=12410475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3430688A Granted JPH01209899A (ja) 1988-02-17 1988-02-17 圧電型受話器

Country Status (1)

Country Link
JP (1) JPH01209899A (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5222217B2 (ja) * 2009-04-24 2013-06-26 パナソニック株式会社 煙感知器

Also Published As

Publication number Publication date
JPH01209899A (ja) 1989-08-23

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