JPS5799100A - Electrostatic type electro-acoustic converter - Google Patents

Electrostatic type electro-acoustic converter

Info

Publication number
JPS5799100A
JPS5799100A JP17468280A JP17468280A JPS5799100A JP S5799100 A JPS5799100 A JP S5799100A JP 17468280 A JP17468280 A JP 17468280A JP 17468280 A JP17468280 A JP 17468280A JP S5799100 A JPS5799100 A JP S5799100A
Authority
JP
Japan
Prior art keywords
radiation
plane
circumference
sound wave
center
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
JP17468280A
Other languages
Japanese (ja)
Other versions
JPH021439B2 (en
Inventor
Susumu Katayama
Hironobu Inoue
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP17468280A priority Critical patent/JPS5799100A/en
Publication of JPS5799100A publication Critical patent/JPS5799100A/en
Publication of JPH021439B2 publication Critical patent/JPH021439B2/ja
Granted 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
    • H04R19/00—Electrostatic transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

PURPOSE:To decrease the value of relative radiation strength of side lobes in the directivity and to make accurate transmission/reception operation, by slightly inclining the circumference of a sound wave radiation plane to the center toward the radiation of an acoustic wave. CONSTITUTION:A circumference of a sound wave radiation plane 7 consisting of a fixed electrode 1, oscillation film 4 and moving electrode 5 have a slope of about 12 degrees from the center to the radiation direction of sound waves. Taking the radius of an acoustic wave radiation plane 7 as 1 and the radius of the center part as 0.65, by applying an AC voltage between the fixed electrode 1 and the moving electrode 5, the sound wave radiated from the circumference leads in phase gradually to those radiated from the center part. Through the operation of the plane 7, the relative radiation strength of side lobes other than main lobe in the directivity is reduced remarkably.
JP17468280A 1980-12-12 1980-12-12 Electrostatic type electro-acoustic converter Granted JPS5799100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17468280A JPS5799100A (en) 1980-12-12 1980-12-12 Electrostatic type electro-acoustic converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17468280A JPS5799100A (en) 1980-12-12 1980-12-12 Electrostatic type electro-acoustic converter

Publications (2)

Publication Number Publication Date
JPS5799100A true JPS5799100A (en) 1982-06-19
JPH021439B2 JPH021439B2 (en) 1990-01-11

Family

ID=15982844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17468280A Granted JPS5799100A (en) 1980-12-12 1980-12-12 Electrostatic type electro-acoustic converter

Country Status (1)

Country Link
JP (1) JPS5799100A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796725A (en) * 1981-09-14 1989-01-10 Matsushita Electric Works, Ltd. Electrostatic transducer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362519A (en) * 1976-11-12 1978-06-05 Polaroid Corp Electrostatic sound transducer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5362519A (en) * 1976-11-12 1978-06-05 Polaroid Corp Electrostatic sound transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796725A (en) * 1981-09-14 1989-01-10 Matsushita Electric Works, Ltd. Electrostatic transducer

Also Published As

Publication number Publication date
JPH021439B2 (en) 1990-01-11

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