FR1458899A - Crystal microphone - Google Patents

Crystal microphone

Info

Publication number
FR1458899A
FR1458899A FR42977A FR42977A FR1458899A FR 1458899 A FR1458899 A FR 1458899A FR 42977 A FR42977 A FR 42977A FR 42977 A FR42977 A FR 42977A FR 1458899 A FR1458899 A FR 1458899A
Authority
FR
France
Prior art keywords
crystal microphone
microphone
crystal
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
FR42977A
Other languages
French (fr)
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 and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
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 to DES94734A priority Critical patent/DE1277346B/en
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR1458899A publication Critical patent/FR1458899A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00Piezo-electric transducers; Electrostrictive transducers
    • H04R17/02Microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/08Mouthpieces; Microphones; Attachments therefor
    • H04R1/083Special constructions of mouthpieces
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/006Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
FR42977A 1964-12-21 1965-12-20 Crystal microphone Expired FR1458899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES94734A DE1277346B (en) 1964-12-21 1964-12-21 Crystal microphone

Publications (1)

Publication Number Publication Date
FR1458899A true FR1458899A (en) 1966-11-10

Family

ID=7518895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR42977A Expired FR1458899A (en) 1964-12-21 1965-12-20 Crystal microphone

Country Status (6)

Country Link
US (1) US3472972A (en)
AT (1) AT258372B (en)
CH (1) CH432594A (en)
DE (1) DE1277346B (en)
FR (1) FR1458899A (en)
NL (1) NL6515063A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666899A (en) * 1971-01-04 1972-05-30 Rolamite Inc Push button switches with interlocking diaphragm contact
DE3221997C2 (en) * 1982-06-11 1989-03-16 Securiton Ag, Zollikofen, Bern, Ch
SE443483B (en) * 1983-01-14 1986-02-24 Gustav Georg Arne Bolin RECEIVER MAGNETIC FOR SOUND WAVES CONSISTING OF A RESONANCE DISC AND ANTICULAR CAUSED BY THE SOUND MOVES REACTING PIEZOELECTRIC MICROPHONE TYPE MICROPHONE
DE3623587C2 (en) * 1986-07-12 1991-07-04 Gerd 3414 Hardegsen De Kress
US8003878B2 (en) * 2008-08-05 2011-08-23 Gaynier David A Electroacoustic transducer system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE728240C (en) * 1937-10-23 1942-11-23 Telefunken Gmbh Protection device for electrical pickups
DE936653C (en) * 1951-03-22 1955-12-15 Electroacustic Ges M B H Pickup systems on speaking machines
US3383475A (en) * 1965-09-08 1968-05-14 Euphonics Corp Microphone employing piezoresistive element

Also Published As

Publication number Publication date
US3472972A (en) 1969-10-14
DE1277346B (en) 1968-09-12
AT258372B (en) 1967-11-27
NL6515063A (en) 1966-06-22
CH432594A (en) 1967-03-31

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