IT1001915B - Microfono a carbone - Google Patents

Microfono a carbone

Info

Publication number
IT1001915B
IT1001915B IT31620/73A IT3162073A IT1001915B IT 1001915 B IT1001915 B IT 1001915B IT 31620/73 A IT31620/73 A IT 31620/73A IT 3162073 A IT3162073 A IT 3162073A IT 1001915 B IT1001915 B IT 1001915B
Authority
IT
Italy
Prior art keywords
charcoal
microphone
charcoal microphone
Prior art date
Application number
IT31620/73A
Other languages
English (en)
Italian (it)
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of IT1001915B publication Critical patent/IT1001915B/it

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Telephone Set Structure (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
IT31620/73A 1972-11-24 1973-11-22 Microfono a carbone IT1001915B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5431472A GB1360559A (en) 1972-11-24 1972-11-24 Carbon microphone

Publications (1)

Publication Number Publication Date
IT1001915B true IT1001915B (it) 1976-04-30

Family

ID=10470609

Family Applications (1)

Application Number Title Priority Date Filing Date
IT31620/73A IT1001915B (it) 1972-11-24 1973-11-22 Microfono a carbone

Country Status (15)

Country Link
US (1) US3859478A (enrdf_load_stackoverflow)
JP (1) JPS4984430A (enrdf_load_stackoverflow)
AR (1) AR199010A1 (enrdf_load_stackoverflow)
AT (1) ATA982873A (enrdf_load_stackoverflow)
AU (1) AU6192973A (enrdf_load_stackoverflow)
BE (1) BE807626A (enrdf_load_stackoverflow)
BR (1) BR7308746D0 (enrdf_load_stackoverflow)
CA (1) CA995349A (enrdf_load_stackoverflow)
CH (1) CH558626A (enrdf_load_stackoverflow)
DE (1) DE2358243A1 (enrdf_load_stackoverflow)
ES (1) ES420820A1 (enrdf_load_stackoverflow)
FR (1) FR2208266B3 (enrdf_load_stackoverflow)
GB (1) GB1360559A (enrdf_load_stackoverflow)
IT (1) IT1001915B (enrdf_load_stackoverflow)
NL (1) NL7315631A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541570A (en) * 1994-12-09 1996-07-30 Force Imaging Technologies, Inc. Force sensing ink, method of making same and improved force sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US486244A (en) * 1892-11-15 Charles clamond
US919908A (en) * 1908-07-13 1909-04-27 Harold Sheen Martin Electrical-resistance device.
US1086726A (en) * 1909-03-11 1914-02-10 Johan Burchardt Opsahl Resistance unit.

Also Published As

Publication number Publication date
AR199010A1 (es) 1974-07-31
GB1360559A (en) 1974-07-17
ES420820A1 (es) 1976-04-01
ATA982873A (de) 1976-05-15
FR2208266B3 (enrdf_load_stackoverflow) 1976-10-08
NL7315631A (enrdf_load_stackoverflow) 1974-05-28
BR7308746D0 (pt) 1974-08-22
CA995349A (en) 1976-08-17
AU6192973A (en) 1975-05-01
FR2208266A1 (enrdf_load_stackoverflow) 1974-06-21
US3859478A (en) 1975-01-07
CH558626A (de) 1975-01-31
BE807626A (nl) 1974-05-22
JPS4984430A (enrdf_load_stackoverflow) 1974-08-14
DE2358243A1 (de) 1974-05-30

Similar Documents

Publication Publication Date Title
DK135480B (da) Hovedmikrotelefon
IT971692B (it) Apparecchio auricolare
SE386800B (sv) Mikrofonenhet
IT1002250B (it) Trasduttore elettroacustico subacqueo
NL7506585A (nl) Akoestisch film-op-schuimlaminaat.
SE389253B (sv) Hogtalare
IT986369B (it) Trasduttore elettroacustico
DK139147C (da) Rumforskalling
SE384151B (sv) Korrugeringsmaskin
FR2335117A1 (fr) Casque a ecouteurs
IT989118B (it) Trasduttore elettroacustico
AT332139B (de) Diktiergerat
IT989204B (it) Trasduttore elettroacustico
IT977029B (it) Lasep a gas
IT1003592B (it) Microtelefono
IT1000295B (it) Griglia a carbone di legna
IT983458B (it) Elettrodo
DK140463C (da) Rumforskalling
IT960989B (it) Filtraggio a gas
IT979509B (it) Trasduttore elettroacustico
IT1001915B (it) Microfono a carbone
SU466385A1 (ru) Электрод
DK146000C (da) Elektroakustisk transducer
AT345898B (de) Sprechfunkgeraet
NO137804C (no) Mikrofon-enhet.