JPS56800A - Transparent flat speaker - Google Patents

Transparent flat speaker

Info

Publication number
JPS56800A
JPS56800A JP7469879A JP7469879A JPS56800A JP S56800 A JPS56800 A JP S56800A JP 7469879 A JP7469879 A JP 7469879A JP 7469879 A JP7469879 A JP 7469879A JP S56800 A JPS56800 A JP S56800A
Authority
JP
Japan
Prior art keywords
transparent
speaker
plate
frequency
sound
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.)
Pending
Application number
JP7469879A
Other languages
Japanese (ja)
Inventor
Akio Kumada
Shigeo Nakamura
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.)
Hitachi Ltd
Nakamura Seisakusho KK
Original Assignee
Hitachi Ltd
Nakamura Seisakusho KK
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 Hitachi Ltd, Nakamura Seisakusho KK filed Critical Hitachi Ltd
Priority to JP7469879A priority Critical patent/JPS56800A/en
Priority to IN637/CAL/80A priority patent/IN152629B/en
Priority to US06/155,228 priority patent/US4352961A/en
Priority to DE3021597A priority patent/DE3021597C2/en
Priority to CH447980A priority patent/CH641925B/en
Priority to GB8019468A priority patent/GB2052919B/en
Publication of JPS56800A publication Critical patent/JPS56800A/en
Pending 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
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

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

Abstract

PURPOSE:To form the speaker of small size and excellent in sound characteristics, by oscillating the transparent oscillation plate of specific shape with the oscillator consisting of transparent electrode and transparent piezoelectric crystal. CONSTITUTION:The bimorph oscillator consisting of transparent electrodes 21, 22 and transparent piezoelectric ceramic 13 is attached to the transparent glass plate 5 of ellipse flat plate to form a speaker. The sound volume-frequency characteristics of this speaker have no peak value at specific frequency and have flat frequency distribution in the range of 1.5-4kHz. Accordingly, simple words such as time, alarm and announcement can be announced. Thus, a speaker small in size and excellent in sound characteristics can be formed. Further, the diaphragm plate is not limited to ellipse shape. Specified frequency characteristics can be given even with chamfered polygon.
JP7469879A 1979-06-15 1979-06-15 Transparent flat speaker Pending JPS56800A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP7469879A JPS56800A (en) 1979-06-15 1979-06-15 Transparent flat speaker
IN637/CAL/80A IN152629B (en) 1979-06-15 1980-05-29
US06/155,228 US4352961A (en) 1979-06-15 1980-06-02 Transparent flat panel piezoelectric speaker
DE3021597A DE3021597C2 (en) 1979-06-15 1980-06-09 Transparent flat speaker
CH447980A CH641925B (en) 1979-06-15 1980-06-11 TRANSPARENT FLAT SPEAKER.
GB8019468A GB2052919B (en) 1979-06-15 1980-06-13 Transparent flat panel speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7469879A JPS56800A (en) 1979-06-15 1979-06-15 Transparent flat speaker

Publications (1)

Publication Number Publication Date
JPS56800A true JPS56800A (en) 1981-01-07

Family

ID=13554697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7469879A Pending JPS56800A (en) 1979-06-15 1979-06-15 Transparent flat speaker

Country Status (2)

Country Link
JP (1) JPS56800A (en)
IN (1) IN152629B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240995A (en) * 1988-02-18 1989-09-26 Outboard Marine Corp Audio-visual alarm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01240995A (en) * 1988-02-18 1989-09-26 Outboard Marine Corp Audio-visual alarm

Also Published As

Publication number Publication date
IN152629B (en) 1984-02-25

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