EP0035220B1 - Elektroakustischer Wandler - Google Patents

Elektroakustischer Wandler Download PDF

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Publication number
EP0035220B1
EP0035220B1 EP81101323A EP81101323A EP0035220B1 EP 0035220 B1 EP0035220 B1 EP 0035220B1 EP 81101323 A EP81101323 A EP 81101323A EP 81101323 A EP81101323 A EP 81101323A EP 0035220 B1 EP0035220 B1 EP 0035220B1
Authority
EP
European Patent Office
Prior art keywords
transducer
housing
approximately
resonator
helmholtz resonator
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
EP81101323A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0035220A1 (de
Inventor
Erwin Dipl.-Ing. Martin
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
Priority to AT81101323T priority Critical patent/ATE7999T1/de
Publication of EP0035220A1 publication Critical patent/EP0035220A1/de
Application granted granted Critical
Publication of EP0035220B1 publication Critical patent/EP0035220B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to an electroacoustic transducer with a transducer plate arranged in a housing, through which the volume in the housing is divided into a front and rear space, further with a socket which closes the antechamber and has sound passage openings and at least one on a carrier plate in the rear space of the housing arranged Helmholtz resonator for damping resonance peaks.
  • a converter is known from EP-A-0007436.
  • the resonance increase caused by the mass and suspension of the membrane is known to be compensated for by a Helmholtz resonator coupled to the membrane rear space.
  • the mass, suspension and friction of the air in the Helmholtz resonator are geometrically realized by means of a neck, to which a damping material such as silk, wire mesh or sintered metal is subsequently applied.
  • a damping material such as silk, wire mesh or sintered metal is subsequently applied.
  • the flow resistance of the damping material is subject to relatively large tolerances, which are further increased by the application of the damping material to the neck, for example by an adhesive process, so that disadvantageous deviations can occur in series production.
  • Another disadvantage is the relatively high cost of materials, assembly and testing.
  • the object is achieved according to the invention in that the friction and part of the air mass of the Helmholtz resonator are formed by very narrow and deep slit-like sound passage openings arranged in the carrier plate, to which the neck of the Helmholtz resonator connects.
  • the sound passage openings can be formed by slots in the carrier plate.
  • the slots have a length of 0.25 to 0.5 mm, a width of 0.05 to 0.1 mm and a depth of 2 to 3 mm, the resonator neck having a diameter of approximately 2 , 4 mm and a length of about 3.4 mm.
  • the sum of the depths is approximately 8 mm and a width of 0.05 to 0.1 mm, the resonator neck having a diameter of approximately 2.4 mm and a length of approximately 3.4 mm.
  • the carrier 2 which carries a circuit board 3 with electronic components on its side facing the bottom of the housing 1.
  • a circuit board 3 with electronic components on its side facing the bottom of the housing 1.
  • two contact blades are arranged (contact blades 4 shown) which protrude through recesses 5 of the housing, form the electrical connection to the outside and fixes the carrier 2 with circuit board 3 in the housing.
  • a bearing body 8 is also arranged on the carrier 2, over which a transducer plate 10 provided with a piezoceramic layer 9 is supported. Another bearing body 11 forms the counter bearing.
  • the housing 1 is closed by a partition plate 12, which is inseparable from is connected to the housing. This partition plate has a plurality of sound passage openings 13 arranged in a circle.
  • the transducer thus formed is closed by a socket 15, which in turn has sound passage openings 16 arranged in a circle. These sound passage openings are arranged in a circle with a larger diameter than the sound passage openings arranged in the partition plate.
  • a damping disk 17 is arranged between the partition plate and the socket, which is mounted in a cylindrical extension 18 of the socket and partially fills the space in front of the partition plate. The damping disc is dimensioned so that it covers the sound passage openings of the partition plate.
  • the carrier 2 now has a number of Helmholtz resonators 6, only one Helmholtz resonator being shown.
  • the Helmholtz resonator consists of the neck 7 and a plurality of slots 14 closing these.
  • FIG. 2 A Helmholtz resonator is now shown in detail in FIG. 2. It consists of a housing 19 having a cylindrical recesses having the resonator neck 20 with the mass m H, the length 1 and the diameter d 2. The resonator neck 20 is closed on one side with slots 21 which have the friction r 1 and the air mass m. The length of the slots is designated 1 1 .
  • a slot is shown to illustrate its dimensions.
  • the slot has a length 1 1 , a depth h and a width b.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Electroluminescent Light Sources (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Surgical Instruments (AREA)
EP81101323A 1980-02-29 1981-02-24 Elektroakustischer Wandler Expired EP0035220B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101323T ATE7999T1 (de) 1980-02-29 1981-02-24 Elektroakustischer wandler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3007834 1980-02-29
DE19803007834 DE3007834A1 (de) 1980-02-29 1980-02-29 Elektroakustischer wandler

Publications (2)

Publication Number Publication Date
EP0035220A1 EP0035220A1 (de) 1981-09-09
EP0035220B1 true EP0035220B1 (de) 1984-06-13

Family

ID=6095966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101323A Expired EP0035220B1 (de) 1980-02-29 1981-02-24 Elektroakustischer Wandler

Country Status (9)

Country Link
US (1) US4379212A (US20090163788A1-20090625-C00002.png)
EP (1) EP0035220B1 (US20090163788A1-20090625-C00002.png)
JP (1) JPS56134899A (US20090163788A1-20090625-C00002.png)
AT (1) ATE7999T1 (US20090163788A1-20090625-C00002.png)
AU (1) AU542702B2 (US20090163788A1-20090625-C00002.png)
BR (1) BR8101223A (US20090163788A1-20090625-C00002.png)
DE (1) DE3007834A1 (US20090163788A1-20090625-C00002.png)
FI (1) FI76665C (US20090163788A1-20090625-C00002.png)
ZA (1) ZA811321B (US20090163788A1-20090625-C00002.png)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542552B1 (fr) * 1983-03-07 1986-04-11 Thomson Csf Transducteur electroacoustique a diaphragme piezo-electrique
ATE28715T1 (de) * 1984-04-11 1987-08-15 Siemens Ag Piezoelektrisch-akustischer wandler fuer elektroakustische kapseln mit konstruktionsausfuehrung fuer die montage.
DE3425176A1 (de) * 1984-07-09 1986-02-20 Fernsprech Und Signalbau Kg Sc Piezoelektrische fernsprechkapsel
DE3528212A1 (de) * 1984-08-10 1986-02-20 Passac Pty. Ltd., Chippendale, New South Wales Helmholtz-resonanz-simulator
AU588933B2 (en) * 1985-12-10 1989-09-28 Alcatel Australia Limited Improvements in transducers
JP2783839B2 (ja) * 1989-03-29 1998-08-06 三洋電機株式会社 スピーカ装置
DE4117598C2 (de) * 1991-05-29 1993-12-16 Fernsprech Und Signalbau Gmbh Fernsprechapparat
US6279946B1 (en) 1998-06-09 2001-08-28 Automotive Technologies International Inc. Methods for controlling a system in a vehicle using a transmitting/receiving transducer and/or while compensating for thermal gradients
US6856876B2 (en) 1998-06-09 2005-02-15 Automotive Technologies International, Inc. Methods for controlling a system in a vehicle using a transmitting/receiving transducer and/or while compensating for thermal gradients
US6517107B2 (en) 1998-06-09 2003-02-11 Automotive Technologies International, Inc. Methods for controlling a system in a vehicle using a transmitting/receiving transducer and/or while compensating for thermal gradients
US5406161A (en) * 1994-05-24 1995-04-11 Industrial Technology Research Institute Piezoelectric composite receiver
IT1277195B1 (it) * 1995-06-28 1997-11-05 Alcatel Dial Face Spa Perfezionamento nel sistema di equalizzazione di un trasduttore telefonico di tipo piezoceramico
TW431113B (en) * 1998-04-22 2001-04-21 Hokuriku Elect Ind Piezoelectric acoustic device
US11229927B2 (en) 2015-10-21 2022-01-25 Agency For Science, Technology And Research Ultrasound transducer and method of forming ihe same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139547B (de) * 1959-05-23 1962-11-15 Holmberg & Co Schallwandler und Verfahren zu seiner Herstellung
DE2246981A1 (de) * 1972-09-25 1974-04-18 Siemens Ag Anordnung zur frequenzgangbeeinflussung elektroakustischer wandler
DE2643695A1 (de) * 1975-10-02 1977-04-14 Akg Akustische Kino Geraete Akustischer reibungswiderstand und vorrichtung zu seiner herstellung
EP0007436A1 (de) * 1978-07-17 1980-02-06 Siemens Aktiengesellschaft Elektroakustischer Wandler mit piezoelektrischer Schicht versehener Membran

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252846A (en) * 1938-09-30 1941-08-19 Associated Electric Lab Inc Acoustic device
BE562680A (US20090163788A1-20090625-C00002.png) * 1956-11-26
DE2322475C2 (de) * 1972-02-09 1981-10-08 Fernsprech- Und Signalbau Lehner & Co Kg, 4300 Essen Elektroakustischer Wandler, insbesondere für Sprech- und Hörkapseln von Fernsprechapparaten
DE2206093C3 (de) * 1972-02-09 1981-04-02 Fernsprech- Und Signalbau Lehner & Co Kg, 4300 Essen Elektroakustischer Wandler, insbesondere für Sprech- und Hörkapseln von Fernsprechapparaten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139547B (de) * 1959-05-23 1962-11-15 Holmberg & Co Schallwandler und Verfahren zu seiner Herstellung
DE2246981A1 (de) * 1972-09-25 1974-04-18 Siemens Ag Anordnung zur frequenzgangbeeinflussung elektroakustischer wandler
DE2643695A1 (de) * 1975-10-02 1977-04-14 Akg Akustische Kino Geraete Akustischer reibungswiderstand und vorrichtung zu seiner herstellung
EP0007436A1 (de) * 1978-07-17 1980-02-06 Siemens Aktiengesellschaft Elektroakustischer Wandler mit piezoelektrischer Schicht versehener Membran

Also Published As

Publication number Publication date
BR8101223A (pt) 1981-09-01
ATE7999T1 (de) 1984-06-15
FI76665C (fi) 1988-11-10
AU6790481A (en) 1981-09-03
US4379212A (en) 1983-04-05
FI76665B (fi) 1988-07-29
JPS56134899A (en) 1981-10-21
EP0035220A1 (de) 1981-09-09
AU542702B2 (en) 1985-03-07
DE3007834A1 (de) 1981-09-17
JPS6142480B2 (US20090163788A1-20090625-C00002.png) 1986-09-20
FI810623L (fi) 1981-08-30
ZA811321B (en) 1982-03-31

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