AT338896B - MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE - Google Patents

MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE

Info

Publication number
AT338896B
AT338896B AT550075A AT550075A AT338896B AT 338896 B AT338896 B AT 338896B AT 550075 A AT550075 A AT 550075A AT 550075 A AT550075 A AT 550075A AT 338896 B AT338896 B AT 338896B
Authority
AT
Austria
Prior art keywords
charcoal
microphone capsule
moisture protected
moisture
protected
Prior art date
Application number
AT550075A
Other languages
German (de)
Other versions
ATA550075A (en
Original Assignee
Siemens Ag
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
Priority claimed from DE19742439720 external-priority patent/DE2439720C2/en
Priority claimed from DE19742439688 external-priority patent/DE2439688C2/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of ATA550075A publication Critical patent/ATA550075A/en
Application granted granted Critical
Publication of AT338896B publication Critical patent/AT338896B/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
AT550075A 1974-08-19 1975-07-16 MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE AT338896B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742439720 DE2439720C2 (en) 1974-08-19 1974-08-19 MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE
DE19742439688 DE2439688C2 (en) 1974-08-19 1974-08-19 MOISTURE PROTECTIVE CHARCOAL MICROPHONE CAPSULE

Publications (2)

Publication Number Publication Date
ATA550075A ATA550075A (en) 1977-01-15
AT338896B true AT338896B (en) 1977-09-26

Family

ID=25767572

Family Applications (1)

Application Number Title Priority Date Filing Date
AT550075A AT338896B (en) 1974-08-19 1975-07-16 MOISTURE PROTECTED CHARCOAL MICROPHONE CAPSULE

Country Status (9)

Country Link
AR (1) AR203525A1 (en)
AT (1) AT338896B (en)
BR (1) BR7505266A (en)
CH (1) CH591197A5 (en)
FI (1) FI752160A (en)
FR (1) FR2282766A1 (en)
GB (1) GB1510870A (en)
IT (1) IT1040482B (en)
SE (1) SE409538B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108574917B (en) * 2018-05-28 2021-03-02 歌尔股份有限公司 Electronic device

Also Published As

Publication number Publication date
SE7509277L (en) 1976-02-20
CH591197A5 (en) 1977-09-15
AR203525A1 (en) 1975-09-15
GB1510870A (en) 1978-05-17
SE409538B (en) 1979-08-20
FR2282766A1 (en) 1976-03-19
BR7505266A (en) 1976-08-03
IT1040482B (en) 1979-12-20
ATA550075A (en) 1977-01-15
FI752160A (en) 1976-02-20

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee