NO774102L - Mikrotelefonenhet til bruk under unormale trykkforhold, saerlig til bruk for dykkere - Google Patents

Mikrotelefonenhet til bruk under unormale trykkforhold, saerlig til bruk for dykkere

Info

Publication number
NO774102L
NO774102L NO774102A NO774102A NO774102L NO 774102 L NO774102 L NO 774102L NO 774102 A NO774102 A NO 774102A NO 774102 A NO774102 A NO 774102A NO 774102 L NO774102 L NO 774102L
Authority
NO
Norway
Prior art keywords
chamber
pressure
membrane
microphone unit
unit according
Prior art date
Application number
NO774102A
Other languages
English (en)
Norwegian (no)
Inventor
Jens Gunnar Moeller Larsen
Original Assignee
Jens Gunnar Moeller Larsen
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 Jens Gunnar Moeller Larsen filed Critical Jens Gunnar Moeller Larsen
Publication of NO774102L publication Critical patent/NO774102L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
  • Telephone Set Structure (AREA)
  • Measuring Fluid Pressure (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)
NO774102A 1976-12-02 1977-11-30 Mikrotelefonenhet til bruk under unormale trykkforhold, saerlig til bruk for dykkere NO774102L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5026876 1976-12-02

Publications (1)

Publication Number Publication Date
NO774102L true NO774102L (no) 1978-06-05

Family

ID=10455301

Family Applications (1)

Application Number Title Priority Date Filing Date
NO774102A NO774102L (no) 1976-12-02 1977-11-30 Mikrotelefonenhet til bruk under unormale trykkforhold, saerlig til bruk for dykkere

Country Status (5)

Country Link
JP (1) JPS5394919A (da)
DE (1) DE2753848A1 (da)
DK (1) DK530077A (da)
NO (1) NO774102L (da)
SE (1) SE7713661L (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2581037B2 (ja) * 1986-06-09 1997-02-12 ソニー株式会社 防水型イヤホン
JPH0510442Y2 (da) * 1989-12-14 1993-03-15
FR2738442B1 (fr) * 1995-09-01 1997-11-28 Degreane Ets Transducteur electrodynamique compense

Also Published As

Publication number Publication date
DK530077A (da) 1978-06-03
JPS5394919A (en) 1978-08-19
DE2753848A1 (de) 1978-06-08
SE7713661L (sv) 1978-06-03

Similar Documents

Publication Publication Date Title
US2754365A (en) Acoustical tone control for wearable hearing aids
US3789166A (en) Submersion-safe microphone
DK158242B (da) Ventil, der er indrettet til at aabnes ved undertryk
US4926398A (en) Pressure compensated communication system
WO2005019786A3 (en) Bi-planar differential pressure transmitter with orthogonal process connections
JPH01302241A (ja) 水中及び防水製品の内圧調整機構
GB2064912A (en) Pressure-chamber monitoring camera
NO774102L (no) Mikrotelefonenhet til bruk under unormale trykkforhold, saerlig til bruk for dykkere
EP4180910B1 (en) Wearable device
NO342949B1 (no) Hørselsbeskyttelse
JPS5929886B2 (ja) バキュ−ムコントロ−ルバルブ装置
US2937244A (en) Electrical-acoustic transducer
US1242672A (en) Telephone equipment.
US3539735A (en) Sintered transducer housing providing acoustical resistance and waterproofing
JP2001313990A (ja) 防水マイク
US1002567A (en) Sound-receiving device.
US1461220A (en) Submarine signaling
US2444049A (en) Pressure compensated submarine sound transmitter or receiver
US1490742A (en) Sound-detecting device
US3683600A (en) Filter apparatus to protect a switch chamber against moisture
US1419596A (en) Microphone mounting
US2059714A (en) Hand telephone
JPS57198670A (en) Air pressure responding electric switch
US1409341A (en) Submarine signaling
WO1995021512A1 (en) Water submersible microphone