NL155162B - Piezo-elektrische microfoon. - Google Patents
Piezo-elektrische microfoon.Info
- Publication number
- NL155162B NL155162B NL707007549A NL7007549A NL155162B NL 155162 B NL155162 B NL 155162B NL 707007549 A NL707007549 A NL 707007549A NL 7007549 A NL7007549 A NL 7007549A NL 155162 B NL155162 B NL 155162B
- Authority
- NL
- Netherlands
- Prior art keywords
- piezo
- electric microphone
- microphone
- electric
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
- G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4666569U JPS496952Y1 (nl) | 1969-05-22 | 1969-05-22 | |
JP4911269U JPS4736109Y1 (nl) | 1969-05-26 | 1969-05-26 | |
JP4122469 | 1969-05-26 | ||
JP6237069U JPS5215214Y1 (nl) | 1969-06-27 | 1969-06-27 | |
JP6236869U JPS4741469Y1 (nl) | 1969-06-27 | 1969-06-27 | |
JP9664069U JPS4938414Y1 (nl) | 1969-10-09 | 1969-10-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
NL7007549A NL7007549A (nl) | 1970-11-30 |
NL155162B true NL155162B (nl) | 1977-11-15 |
Family
ID=27550025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL707007549A NL155162B (nl) | 1969-05-22 | 1970-05-25 | Piezo-elektrische microfoon. |
Country Status (4)
Country | Link |
---|---|
US (1) | US3749854A (nl) |
FR (1) | FR2054558B1 (nl) |
GB (1) | GB1316811A (nl) |
NL (1) | NL155162B (nl) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172253A (en) * | 1972-04-19 | 1979-10-23 | Hermans Albert L | Controlled wave pattern ultrasonic burglar alarm |
US4006371A (en) * | 1973-03-19 | 1977-02-01 | Whitewater Electronics, Inc. | Electroacoustical transducer comprising piezoelectric element |
JPS5642499A (en) * | 1979-05-15 | 1981-04-20 | Nippon Ceramic Kk | Ultrasonic-wave transducer |
JPS5667731A (en) * | 1979-11-06 | 1981-06-08 | Nissan Motor Co Ltd | Knocking sensor |
JPS6025956B2 (ja) * | 1980-12-10 | 1985-06-21 | 松下電器産業株式会社 | 超音波送受波器 |
JPS5851697A (ja) * | 1981-09-22 | 1983-03-26 | Matsushita Electric Ind Co Ltd | 超音波送受波器 |
US4607186A (en) * | 1981-11-17 | 1986-08-19 | Matsushita Electric Industrial Co. Ltd. | Ultrasonic transducer with a piezoelectric element |
FR2536622B1 (fr) * | 1982-11-19 | 1986-03-07 | Thomson Csf | Hydrophone de vitesse |
US5185728A (en) * | 1990-10-31 | 1993-02-09 | Cyber Scientific | Omnidirectional ultrasonic transducer |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1376306A (fr) * | 1963-02-07 | 1964-10-23 | Brown Ltd S G | Perfectionnements aux transducteurs électro-acoustiques |
US3360664A (en) * | 1964-10-30 | 1967-12-26 | Gen Dynamics Corp | Electromechanical apparatus |
-
1970
- 1970-05-22 GB GB2499970A patent/GB1316811A/en not_active Expired
- 1970-05-25 FR FR7018965A patent/FR2054558B1/fr not_active Expired
- 1970-05-25 NL NL707007549A patent/NL155162B/nl not_active IP Right Cessation
-
1972
- 1972-04-18 US US00245284A patent/US3749854A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE2025084B2 (de) | 1972-06-15 |
NL7007549A (nl) | 1970-11-30 |
DE2025084A1 (de) | 1971-01-14 |
US3749854A (en) | 1973-07-31 |
FR2054558A1 (nl) | 1971-04-23 |
GB1316811A (en) | 1973-05-16 |
FR2054558B1 (nl) | 1975-09-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: MATSUSHITA EL |
|
V4 | Discontinued because of reaching the maximum lifetime of a patent |