AT258372B - Crystal microphone - Google Patents
Crystal microphoneInfo
- Publication number
- AT258372B AT258372B AT1144865A AT1144865A AT258372B AT 258372 B AT258372 B AT 258372B AT 1144865 A AT1144865 A AT 1144865A AT 1144865 A AT1144865 A AT 1144865A AT 258372 B AT258372 B AT 258372B
- Authority
- AT
- Austria
- Prior art keywords
- crystal microphone
- microphone
- crystal
- Prior art date
Links
- 239000013078 crystal Substances 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- 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
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (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 |
---|---|
AT258372B true AT258372B (en) | 1967-11-27 |
Family
ID=7518895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT1144865A AT258372B (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)
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 |
DE3221997A1 (en) * | 1982-06-11 | 1983-12-15 | Securiton AG, 3052 Zollikofen, Bern | DEVICE FOR MONITORING ARMORED ROOMS, ESPECIALLY SAFE AND CABINETS, AND FOR GENERATING AN ALARM SIGNAL WHEN A BURGLAR ATTEMPT IS TAKEN |
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 |
DE3623587A1 (en) * | 1986-07-12 | 1988-01-21 | Gerd Kress | Appliance for measuring the operating time of machines |
US8003878B2 (en) * | 2008-08-05 | 2011-08-23 | Gaynier David A | Electroacoustic transducer system |
Family Cites Families (3)
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 |
-
1964
- 1964-12-21 DE DES94734A patent/DE1277346B/en active Pending
-
1965
- 1965-11-19 NL NL6515063A patent/NL6515063A/xx unknown
- 1965-12-13 US US513266A patent/US3472972A/en not_active Expired - Lifetime
- 1965-12-20 FR FR42977A patent/FR1458899A/en not_active Expired
- 1965-12-20 CH CH1753965A patent/CH432594A/en unknown
- 1965-12-20 AT AT1144865A patent/AT258372B/en active
Also Published As
Publication number | Publication date |
---|---|
CH432594A (en) | 1967-03-31 |
DE1277346B (en) | 1968-09-12 |
US3472972A (en) | 1969-10-14 |
NL6515063A (en) | 1966-06-22 |
FR1458899A (en) | 1966-11-10 |
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