BE832549A - Capsule microphonique a charbon, protegee contre l'humidite - Google Patents

Capsule microphonique a charbon, protegee contre l'humidite

Info

Publication number
BE832549A
BE832549A BE159302A BE159302A BE832549A BE 832549 A BE832549 A BE 832549A BE 159302 A BE159302 A BE 159302A BE 159302 A BE159302 A BE 159302A BE 832549 A BE832549 A BE 832549A
Authority
BE
Belgium
Prior art keywords
charcoal
protected against
microphone capsule
against humidity
humidity
Prior art date
Application number
BE159302A
Other languages
English (en)
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 filed Critical
Publication of BE832549A publication Critical patent/BE832549A/fr

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
    • 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; 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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
BE159302A 1974-08-19 1975-08-19 Capsule microphonique a charbon, protegee contre l'humidite BE832549A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE832549A true BE832549A (fr) 1976-02-19

Family

ID=5923539

Family Applications (1)

Application Number Title Priority Date Filing Date
BE159302A BE832549A (fr) 1974-08-19 1975-08-19 Capsule microphonique a charbon, protegee contre l'humidite

Country Status (3)

Country Link
BE (1) BE832549A (fr)
DE (1) DE2439688C2 (fr)
ZA (1) ZA754920B (fr)

Also Published As

Publication number Publication date
DE2439688C2 (de) 1976-09-30
DE2439688B1 (de) 1976-02-12
ZA754920B (en) 1976-07-28

Similar Documents

Publication Publication Date Title
BE838938A (fr) Comprimes efferverscents d'edulcorants
FR2315841A1 (fr) Moissonneuse a cereales
NL7702667A (nl) Capsule.
NL164991C (nl) Wikkelcondensator met overdrukbeveiliging.
DK480176A (da) Direkte virkende respirator
SE7610260L (sv) Brottskydd for anggenerator
JPS51112325A (en) Open type loudspeaker housing
JPS5299869A (en) Electret sensor
BE838128A (fr) Composes heterocycliques
IT1088511B (it) Alimentatore a pressione
IL52329A (en) Pharmaceutical compostitions containing (3-(4-quinolyl)-1-propyl)-4-piperidines
FR2301228A1 (fr) Composes a odeu
FR2363104B1 (fr) Radiodiffractometre a poudre
FR2282766A1 (fr) Capsule microphonique a charbon, protegee contre l'humidite
BE832549A (fr) Capsule microphonique a charbon, protegee contre l'humidite
BE879382A (fr) Capsule a membrane
JPS5296750A (en) Oral drug compound
IL49328A0 (en) Novel tetrazole derivatives
JPS5244236A (en) Insecticide containing 33nnphenyl carbamoyll44 hydroxycoumarine derivative
FI55051C (fi) Foerfarande foer framstaellning av ett nytt jonofort polyeterantibiotikum s 11743/a
GB1520777A (en) Herbicidal n-substituted alph-haloacetanilides
JPS525929A (en) Tree planting sound proof wall
SE431938B (sv) Andningsskyddsapparat
NL7614253A (nl) Verpakte ritssluiting.
IL51196A0 (en) A novel benzocycloheptathiophene derivative its production and pharmaceutical compositions containing it