SE409538B - CARBON MICROPHONE CAPSULA - Google Patents

CARBON MICROPHONE CAPSULA

Info

Publication number
SE409538B
SE409538B SE7509277A SE7509277A SE409538B SE 409538 B SE409538 B SE 409538B SE 7509277 A SE7509277 A SE 7509277A SE 7509277 A SE7509277 A SE 7509277A SE 409538 B SE409538 B SE 409538B
Authority
SE
Sweden
Prior art keywords
carbon
capsula
carbon microphone
moisture
sleeve
Prior art date
Application number
SE7509277A
Other languages
Swedish (sv)
Other versions
SE7509277L (en
Inventor
E Muller
J Seidlmeyer
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 DE19742439688 external-priority patent/DE2439688C2/en
Priority claimed from DE19742439720 external-priority patent/DE2439720C2/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of SE7509277L publication Critical patent/SE7509277L/en
Publication of SE409538B publication Critical patent/SE409538B/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)

Abstract

1510870 Carbon microphones SIEMENS AG 15 July 1975 [19 Aug 1974(2)] 29598/75 Heading H4J In a carbon microphone of the type disclosed in Specification 957,384 wherein part of the chamber containing the carbon granules is closed by an air permeable pit 10, and a folded sleeve 11 is provided which is impermeable to moisture, the edge of the foil 10 is arranged to be surrounded by moisture impermeable material 11, 12. The material 12 may be formed integrally with the sleeve 11 or may be formed as a separate ring of material.
SE7509277A 1974-08-19 1975-08-19 CARBON MICROPHONE CAPSULA SE409538B (en)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
SE7509277L SE7509277L (en) 1976-02-20
SE409538B true SE409538B (en) 1979-08-20

Family

ID=25767572

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7509277A SE409538B (en) 1974-08-19 1975-08-19 CARBON MICROPHONE CAPSULA

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
AR203525A1 (en) 1975-09-15
ATA550075A (en) 1977-01-15
AT338896B (en) 1977-09-26
GB1510870A (en) 1978-05-17
FI752160A (en) 1976-02-20
IT1040482B (en) 1979-12-20
CH591197A5 (en) 1977-09-15
BR7505266A (en) 1976-08-03
FR2282766A1 (en) 1976-03-19
SE7509277L (en) 1976-02-20

Similar Documents

Publication Publication Date Title
AU502198B2 (en) Oxygen enrichment of air by absorption
ES201875U (en) Breathing device. (Machine-translation by Google Translate, not legally binding)
GB1541642A (en) Partial pressure of oxygen sensor
JPS5351096A (en) Packing material of adjusted air permeability
CH613400A5 (en) Laminated material which is permeable to gases or liquids, the production thereof and use thereof
AU485072B2 (en) Improvements relating tothe production of reducing gases
ES203276U (en) Hearing protection. (Machine-translation by Google Translate, not legally binding)
CA1018707A (en) Pretreatment of lignocellulosic material to facilitate oxygen gas delignification
GB1171361A (en) Improvements in and relating to Inflatable Bandages
SE409538B (en) CARBON MICROPHONE CAPSULA
SE408394B (en) PRESS, SPECIAL FOR CONTINUOUS MANUFACTURE OF WOOD PLANTS AND FOAM PLASTS
JPS546345A (en) Moisture-proof method
FR1150434A (en) Improvements to pneumatic controls with special seals
JPS51138710A (en) Manufacture of impermeable carbon products
JPS5263918A (en) Manufacture of impermeable carbon products
SE412415B (en) CONTAINERS Separate for Cultivation of Microorganisms, with Separate Chamber for GASAL BEACH
JPS5436853A (en) Air permeable inner sole and production thereof
JPS5236092A (en) Measuring electrode
JPS52156993A (en) Preparation of d-cysteine and its derivatives
JPS5263917A (en) Manufacture of impermeable carbon materials
JPS51128581A (en) Diaphragm type pressure element
JPS5260438A (en) Drain valve of negative pressure gas path
JPS5263210A (en) Manufacture of impermeable carbon
JPS53122418A (en) Electrodynamic speaker
SU586662A1 (en) Method of obtaining biomass