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JPS5579600A - Piezoelectric speaker - Google Patents

Piezoelectric speaker

Info

Publication number
JPS5579600A
JPS5579600A JP15390878A JP15390878A JPS5579600A JP S5579600 A JPS5579600 A JP S5579600A JP 15390878 A JP15390878 A JP 15390878A JP 15390878 A JP15390878 A JP 15390878A JP S5579600 A JPS5579600 A JP S5579600A
Authority
JP
Japan
Prior art keywords
secondary resonance
sound pressure
output sound
piezoelectric bimorph
bimorph element
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.)
Granted
Application number
JP15390878A
Other languages
Japanese (ja)
Other versions
JPS603278B2 (en
Inventor
Shoji Nakajima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15390878A priority Critical patent/JPS603278B2/en
Publication of JPS5579600A publication Critical patent/JPS5579600A/en
Publication of JPS603278B2 publication Critical patent/JPS603278B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

PURPOSE:To flaten output sound pressure frequency characteristics by providing an arc-shaped non-polarization part on a ring-shaped surface encircled with two knot rings of secondary resonance of a piezoelectric bimorph element. CONSTITUTION:With one surface of piezoelectric bimorph element 5, the center part of diaphragm 6 in a cone shape is coupled and the circumferential part of diaphragm 6 is combined with that of frame 7 formed of synthetic resin and metal. On ring-shaped surface 10 encircled with two knot rings 8 and 9 of the secondary resonance of piezoelectric bimorph element 5, several arc-shaped non-polarization parts 11 are formed at the same circumference. Then, driving force can be lowered by providing those non-polarization parts 11 to reduce the driving force of the entire secondary resonance, so that an output sound pressure level in the secondary resonance can be controlled. Further, a flat output sound pressure frequency can be obtained on the whole.
JP15390878A 1978-12-12 1978-12-12 piezoelectric speaker Expired JPS603278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15390878A JPS603278B2 (en) 1978-12-12 1978-12-12 piezoelectric speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15390878A JPS603278B2 (en) 1978-12-12 1978-12-12 piezoelectric speaker

Publications (2)

Publication Number Publication Date
JPS5579600A true JPS5579600A (en) 1980-06-16
JPS603278B2 JPS603278B2 (en) 1985-01-26

Family

ID=15572726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15390878A Expired JPS603278B2 (en) 1978-12-12 1978-12-12 piezoelectric speaker

Country Status (1)

Country Link
JP (1) JPS603278B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111395U (en) * 1983-01-17 1984-07-27 沢藤　正 piezoelectric sound device
JPS63287299A (en) * 1987-05-20 1988-11-24 Nitsuko Corp Piezoelectric sounding body for speaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111395U (en) * 1983-01-17 1984-07-27 沢藤　正 piezoelectric sound device
JPS63287299A (en) * 1987-05-20 1988-11-24 Nitsuko Corp Piezoelectric sounding body for speaker

Also Published As

Publication number Publication date
JPS603278B2 (en) 1985-01-26

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