NL166835B - ELECTRO-ACOUSTIC CONVERTER WITH ELECTRET, AND METHOD FOR MANUFACTURING THE SAME - Google Patents

ELECTRO-ACOUSTIC CONVERTER WITH ELECTRET, AND METHOD FOR MANUFACTURING THE SAME

Info

Publication number
NL166835B
NL166835B NL7214357A NL7214357A NL166835B NL 166835 B NL166835 B NL 166835B NL 7214357 A NL7214357 A NL 7214357A NL 7214357 A NL7214357 A NL 7214357A NL 166835 B NL166835 B NL 166835B
Authority
NL
Netherlands
Prior art keywords
electret
electro
manufacturing
same
acoustic converter
Prior art date
Application number
NL7214357A
Other languages
Dutch (nl)
Other versions
NL166835C (en
NL7214357A (en
Original Assignee
Industrial Research Prod Inc
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 Industrial Research Prod Inc filed Critical Industrial Research Prod Inc
Publication of NL7214357A publication Critical patent/NL7214357A/xx
Publication of NL166835B publication Critical patent/NL166835B/en
Application granted granted Critical
Publication of NL166835C publication Critical patent/NL166835C/en

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
    • 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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
    • H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
NL7214357A 1971-11-08 1972-10-24 ELECTRO-ACOUSTIC CONVERTER WITH ELECTRET, AND METHOD FOR MANUFACTURING THE SAME NL166835C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19659271A 1971-11-08 1971-11-08
US19667771A 1971-11-08 1971-11-08

Publications (3)

Publication Number Publication Date
NL7214357A NL7214357A (en) 1973-05-10
NL166835B true NL166835B (en) 1981-04-15
NL166835C NL166835C (en) 1981-09-15

Family

ID=26892043

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7214357A NL166835C (en) 1971-11-08 1972-10-24 ELECTRO-ACOUSTIC CONVERTER WITH ELECTRET, AND METHOD FOR MANUFACTURING THE SAME

Country Status (7)

Country Link
JP (1) JPS5148067B2 (en)
CH (1) CH556628A (en)
DK (1) DK140578B (en)
FR (1) FR2159372B1 (en)
GB (1) GB1398171A (en)
NL (1) NL166835C (en)
SE (1) SE378500B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188105A (en) * 1981-05-14 1982-11-19 Toshiba Corp Electret constituent

Also Published As

Publication number Publication date
CH556628A (en) 1974-11-29
FR2159372A1 (en) 1973-06-22
DE2254692A1 (en) 1973-05-10
GB1398171A (en) 1975-06-18
NL166835C (en) 1981-09-15
JPS5148067B2 (en) 1976-12-18
NL7214357A (en) 1973-05-10
JPS4859824A (en) 1973-08-22
DE2254692B2 (en) 1976-08-05
FR2159372B1 (en) 1977-08-26
DK140578C (en) 1980-02-18
SE378500B (en) 1975-09-01
DK140578B (en) 1979-10-01

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Legal Events

Date Code Title Description
SNR Assignments of patents or rights arising from examined patent applications

Owner name: KNOWLES ELECTRONICS, INC.

V4 Lapsed because of reaching the maxim lifetime of a patent