GB569510A - Improvements in or relating to piezoelectric transducers - Google Patents
Improvements in or relating to piezoelectric transducersInfo
- Publication number
- GB569510A GB569510A GB10376/43A GB1037643A GB569510A GB 569510 A GB569510 A GB 569510A GB 10376/43 A GB10376/43 A GB 10376/43A GB 1037643 A GB1037643 A GB 1037643A GB 569510 A GB569510 A GB 569510A
- Authority
- GB
- United Kingdom
- Prior art keywords
- case
- june
- enclosed
- crystal
- mass
- 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
Links
- 239000013078 crystal Substances 0.000 abstract 2
- 239000003351 stiffener Substances 0.000 abstract 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
569,510. Telephone transmitters. BRUSH DEVELOPMENT CO. June 26, 1943, No. 10376. Convention date, June 27, 1942. [Class 40 (iv)] A piezo - electric microphone comprises a crystal 5 connected to a diaphragm 3 and carried by a massive mounting disc or ring 1 resiliently supported (e.g. by a rubber annulus 10) within a case 11, the mass of the crystal and disc 1 and the stiffeners of the resilient means being such that the system is resonant to a low audio frequency. The case 11 is enclosed within an outer case 23, the mass of the air moving through the openings 7, 15, 21, 25 and the compliance of the air trapped in the several parts of the transmitter being such as to enhance resonance at the selected low frequency of about 400 c.p.s., and constitute an acoustic low-pass filter with respect to sound entering the case by way of opening 25. In a hearing- aid device, the amplifier, battery, volume control, &c. are enclosed in the case 23 ; the aperture 25 represents the summation of the apertures for the shafts of the various control devices.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US448818A US2399513A (en) | 1942-06-27 | 1942-06-27 | Piezoelectric transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
GB569510A true GB569510A (en) | 1945-05-28 |
Family
ID=23781808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10376/43A Expired GB569510A (en) | 1942-06-27 | 1943-06-26 | Improvements in or relating to piezoelectric transducers |
Country Status (2)
Country | Link |
---|---|
US (1) | US2399513A (en) |
GB (1) | GB569510A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0710822A1 (en) * | 1994-11-04 | 1996-05-08 | Societe Industrielle De Liaisons Electriques | Piezoelectric vibration sensor |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2595489A (en) * | 1941-07-16 | 1952-05-06 | Brush Dev Co | Insert earphone and operative subassembly therefor |
US2769867A (en) * | 1947-02-07 | 1956-11-06 | Sonotone Corp | Dielectrostrictive signal and energy transducers |
US2587684A (en) * | 1948-10-13 | 1952-03-04 | Shure Bros | Directional microphone |
US2575142A (en) * | 1949-08-19 | 1951-11-13 | Sorkin Louis | Microphone attachment for accordions |
US2786899A (en) * | 1951-08-02 | 1957-03-26 | Sonotone Corp | Piezoelectric transducers |
US2773943A (en) * | 1951-12-10 | 1956-12-11 | Poleschook Nick | Pickup and amplifier apparatus |
US2702354A (en) * | 1952-02-28 | 1955-02-15 | Astatic Corp | Contact microphone |
US2957954A (en) * | 1957-03-07 | 1960-10-25 | Turner Company | Microphone |
US3846650A (en) * | 1970-10-08 | 1974-11-05 | Dynamics Corp Massa Div | Electroacoustic transducer of the vibratile diaphragm type with controlled uniformity of performance characteristics and method for controlling uniformity |
FR2531299B1 (en) * | 1982-08-02 | 1986-07-18 | Depaepe Sa Henri | ACOUSTO-ELECTRIC TRANSDUCER, ESPECIALLY FOR A PIEZOELECTRIC MICROPHONE |
JP3123431B2 (en) * | 1996-06-03 | 2001-01-09 | 株式会社村田製作所 | Piezo speaker |
US6130951A (en) * | 1997-04-28 | 2000-10-10 | Murata Manfacturing Co., Ltd. | Speaker having multiple sound bodies and multiple sound openings |
US9882115B2 (en) * | 2015-04-02 | 2018-01-30 | The Boeing Company | Integrated compliant boundary for piezoelectric bimorph actuator |
US20170111731A1 (en) * | 2015-10-20 | 2017-04-20 | Sonion Nederland B.V. | Microphone assembly with suppressed frequency response |
-
1942
- 1942-06-27 US US448818A patent/US2399513A/en not_active Expired - Lifetime
-
1943
- 1943-06-26 GB GB10376/43A patent/GB569510A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0710822A1 (en) * | 1994-11-04 | 1996-05-08 | Societe Industrielle De Liaisons Electriques | Piezoelectric vibration sensor |
Also Published As
Publication number | Publication date |
---|---|
US2399513A (en) | 1946-04-30 |
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