GB1510870A - Carbon microphone capsules - Google Patents

Carbon microphone capsules

Info

Publication number
GB1510870A
GB1510870A GB29598/75A GB2959875A GB1510870A GB 1510870 A GB1510870 A GB 1510870A GB 29598/75 A GB29598/75 A GB 29598/75A GB 2959875 A GB2959875 A GB 2959875A GB 1510870 A GB1510870 A GB 1510870A
Authority
GB
United Kingdom
Prior art keywords
carbon
carbon microphone
microphone capsules
moisture
sleeve
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.)
Expired
Application number
GB29598/75A
Other languages
English (en)
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.)
Siemens AG
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/de
Priority claimed from DE19742439720 external-priority patent/DE2439720C2/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1510870A publication Critical patent/GB1510870A/en
Expired 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
    • 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)
GB29598/75A 1974-08-19 1975-07-15 Carbon microphone capsules Expired GB1510870A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742439688 DE2439688C2 (de) 1974-08-19 1974-08-19 Feuchtigkeitsgeschuetze kohlemikrofonkapsel
DE19742439720 DE2439720C2 (de) 1974-08-19 1974-08-19 Feuchtigkeitsgeschuetzte kohlemikrofonkapsel

Publications (1)

Publication Number Publication Date
GB1510870A true GB1510870A (en) 1978-05-17

Family

ID=25767572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29598/75A Expired GB1510870A (en) 1974-08-19 1975-07-15 Carbon microphone capsules

Country Status (9)

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

Families Citing this family (1)

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

Also Published As

Publication number Publication date
CH591197A5 (fr) 1977-09-15
FR2282766A1 (fr) 1976-03-19
BR7505266A (pt) 1976-08-03
SE7509277L (sv) 1976-02-20
SE409538B (sv) 1979-08-20
AR203525A1 (es) 1975-09-15
ATA550075A (de) 1977-01-15
FI752160A (fr) 1976-02-20
IT1040482B (it) 1979-12-20
AT338896B (de) 1977-09-26

Similar Documents

Publication Publication Date Title
JPS51112694A (en) Packaging material with good permeability
JPS5247233A (en) Air bag
AU502198B2 (en) Oxygen enrichment of air by absorption
GB1541642A (en) Partial pressure of oxygen sensor
GB2013893A (en) Partial pressure of oxygen sensor
JPS5351096A (en) Packing material of adjusted air permeability
JPS5310377A (en) Tablet making method for deoxidizing agent
CH613400A5 (en) Laminated material which is permeable to gases or liquids, the production thereof and use thereof
GB1543638A (en) Partial pressure of oxygen sensor
ES203276U (es) Proteccion auditiva.
CA1018707A (fr) Pretraitement des substances ligno-cellulosiques pour faciliter la delignification par l'oxygene gazeux
GB1510870A (en) Carbon microphone capsules
CA995482A (en) Gas sensor and method of manufacture
JPS546345A (en) Moisture-proof method
JPS51138710A (en) Manufacture of impermeable carbon products
JPS5263918A (en) Manufacture of impermeable carbon products
CA1026097A (fr) Procede et amenagement pour la production de gaz naturel
JPS5239054A (en) An improved sealing construction
JPS5436853A (en) Air permeable inner sole and production thereof
JPS5236092A (en) Measuring electrode
IL46821A (en) 4-acyloxy-3-imino-1,2,4-benzotrianzin-1-oxides, their production and their use for the control of microorganisms
JPS5263917A (en) Manufacture of impermeable carbon materials
DE3362510D1 (en) Filter cigarette
JPS5237572A (en) Rotary tableting machine
JPS5263210A (en) Manufacture of impermeable carbon

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee