GB1293670A - Improvements in or relating to electro-acoustical transducers - Google Patents

Improvements in or relating to electro-acoustical transducers

Info

Publication number
GB1293670A
GB1293670A GB54534/70D GB5453470D GB1293670A GB 1293670 A GB1293670 A GB 1293670A GB 54534/70 D GB54534/70 D GB 54534/70D GB 5453470 D GB5453470 D GB 5453470D GB 1293670 A GB1293670 A GB 1293670A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
gripped
harmonic
piezo
frequency band
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
GB54534/70D
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 AG
Original Assignee
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1293670A publication Critical patent/GB1293670A/en
Expired legal-status Critical Current

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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

1293670 Diaphragms; piezo-electric transducers SIEMENS AG 17 Nov 1970 [5 Dec 1969] 54534/70 Heading H4J An electro -acoustic transducer has a diaphragm 1 gripped in a region intermediate its edge and its centre, and the diaphragm 1 has a vibration node corresponding to a harmonic (other than the fundamental) of the diaphragm 1 which provides a nodal line in a part of the diaphragm remote from the region where it is gripped. The harmonic is in the useful frequency band of the diaphragm, e.g. 100 Hz to 3,500 Hz. A relatively smooth response is thereby obtained over the useful frequency band. Fig. 1 shows a microphone with a titanium diaphragm 1 carrying a layer 2 of piezoelectric ceramic or piezo-resistive material. The diaphragm 1 is gripped on opposite sides by annular extensions 6, 7 and 8, 9 of an elastic bearing 3, preferably of silicon rubber. Weakening grooves 10, 11 and 12, 13 may be provided. A metal support plate 15 has a surrounding flange 16. A centre contact 20 is disposed in an insulating body 19. The electrodes of piezoelectric layer 2 are connected by wires 21, 22 to an amplifier 23. A diode 24 is incorporated. Fig. 3 shows a diaphragm M having a piezoelectric layer P vibrating in a second harmonic mode. A nodal circle is adjacent the gripped area. The diaphragm M deforms the bearing L.
GB54534/70D 1969-12-05 1970-11-17 Improvements in or relating to electro-acoustical transducers Expired GB1293670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1961217A DE1961217C3 (en) 1969-12-05 1969-12-05 Electroacoustic transducers, in particular microphones for telephone systems

Publications (1)

Publication Number Publication Date
GB1293670A true GB1293670A (en) 1972-10-18

Family

ID=5753162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB54534/70D Expired GB1293670A (en) 1969-12-05 1970-11-17 Improvements in or relating to electro-acoustical transducers

Country Status (13)

Country Link
AT (1) AT308860B (en)
BE (1) BE759888A (en)
BG (1) BG20138A3 (en)
BR (1) BR7024166D0 (en)
CH (1) CH522995A (en)
DE (1) DE1961217C3 (en)
FI (1) FI56601C (en)
FR (1) FR2070741B1 (en)
GB (1) GB1293670A (en)
LU (1) LU62172A1 (en)
NL (1) NL172504C (en)
SE (1) SE366190B (en)
ZA (1) ZA708029B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779246A (en) * 1986-03-20 1988-10-18 Siemens Aktiengesellschaft Electro-acoustic transducer
GB2209644A (en) * 1987-09-04 1989-05-17 Ding Pang Chen Circumferential element for a loud speaker
CN114390405A (en) * 2021-12-10 2022-04-22 深圳羽声电子有限公司 Vibrating diaphragm and sound box using same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2119911B2 (en) * 1971-04-23 1973-11-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Electroacoustic converter, in particular microphone for telephone systems
DE2831411C2 (en) * 1978-07-17 1983-10-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electroacoustic transducer with a diaphragm provided with a piezoelectric layer
DE2937922A1 (en) * 1979-09-19 1981-04-09 Siemens AG, 1000 Berlin und 8000 München PIEZOELECTRIC CONVERTER
DE3005708C2 (en) * 1980-02-15 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Transducer plate for piezoelectric transducers
DE3425176A1 (en) * 1984-07-09 1986-02-20 Fernsprech Und Signalbau Kg Sc Piezoelectric telephone capsule
DE3425173A1 (en) * 1984-07-09 1986-01-16 Fernsprech- und Signalbaugesellschaft mbH Schüler & Vershoven, 4300 Essen Piezoelectric telephone capsule
DE3518819A1 (en) * 1985-05-24 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Electro-acoustic transducer
CN1015289B (en) * 1988-08-10 1992-01-01 西门子公司 Electroacoustic transducer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB112333A (en) * 1917-01-24 1918-01-10 Alexander Marr Improvements in or relating to Apparatus for the Reproduction of Sounds.
FR1334235A (en) * 1961-09-29 1963-08-02 Siemens Ag Electro-acoustic transformer
DE1288146B (en) * 1962-10-31 1969-01-30 Siemens Ag Electroacoustic converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779246A (en) * 1986-03-20 1988-10-18 Siemens Aktiengesellschaft Electro-acoustic transducer
GB2209644A (en) * 1987-09-04 1989-05-17 Ding Pang Chen Circumferential element for a loud speaker
CN114390405A (en) * 2021-12-10 2022-04-22 深圳羽声电子有限公司 Vibrating diaphragm and sound box using same
CN114390405B (en) * 2021-12-10 2023-11-28 深圳羽声电子有限公司 Vibrating diaphragm and use its audio amplifier

Also Published As

Publication number Publication date
ZA708029B (en) 1971-08-25
LU62172A1 (en) 1971-05-12
BE759888A (en) 1971-06-04
NL172504C (en) 1983-09-01
NL172504B (en) 1983-04-05
DE1961217C3 (en) 1978-08-24
BR7024166D0 (en) 1973-01-09
NL7017251A (en) 1971-06-08
SE366190B (en) 1974-04-08
DE1961217A1 (en) 1971-06-16
BG20138A3 (en) 1975-10-30
FR2070741A1 (en) 1971-09-17
FI56601B (en) 1979-10-31
CH522995A (en) 1972-05-15
AT308860B (en) 1973-07-25
FI56601C (en) 1980-02-11
DE1961217B2 (en) 1972-10-12
FR2070741B1 (en) 1976-03-19

Similar Documents

Publication Publication Date Title
GB1399766A (en) Acoustic transducer including piezo-electric driving element
JPS6132879B2 (en)
JPS5911237B2 (en) piezoelectric speaker
GB1293670A (en) Improvements in or relating to electro-acoustical transducers
US2910545A (en) Transducer
GB978202A (en) Improvements in or relating to electro-acoustic transducers
US2045403A (en) Piezoelectric device
US4638205A (en) Piezo-electric transducer
GB1402352A (en) Electroacoustic transducers
US1760252A (en) Multiple resonant acoustic device
GB1276196A (en) Electro-acoustic transducer
JPH0136315B2 (en)
JPH0623116Y2 (en) Thin speaker
JPS58184995U (en) Piezoelectric electroacoustic transducer
JPS5789398A (en) Piezoelectric speaker
JPS5772497A (en) Piezoelectric speaker
RU2014758C1 (en) Electroacoustic converter
JPS5910878Y2 (en) ultrasonic ceramic microphone
JPS6029279Y2 (en) piezoelectric sounding body
GB1350023A (en) Electro acoustical transducers
JPS57154999A (en) Plate speaker
JPS5829677Y2 (en) Piezoelectric ceramic electroacoustic transducer
JPS6127277Y2 (en)
KR910006532Y1 (en) Buzzer using piezoelectric element
JPS5931119Y2 (en) electrostatic transducer

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee