EP0201421A1 - Körperschallaufnehmer mit einer piezopolymeren Membran - Google Patents
Körperschallaufnehmer mit einer piezopolymeren Membran Download PDFInfo
- Publication number
- EP0201421A1 EP0201421A1 EP86400958A EP86400958A EP0201421A1 EP 0201421 A1 EP0201421 A1 EP 0201421A1 EP 86400958 A EP86400958 A EP 86400958A EP 86400958 A EP86400958 A EP 86400958A EP 0201421 A1 EP0201421 A1 EP 0201421A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piezoelectric
- grooves
- contact sensor
- membrane
- polymer film
- 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.)
- Withdrawn
Links
- 239000012528 membrane Substances 0.000 title claims description 8
- 230000035945 sensitivity Effects 0.000 claims abstract 2
- 229920006254 polymer film Polymers 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 229920005597 polymer membrane Polymers 0.000 claims 1
- 238000001228 spectrum Methods 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 abstract description 5
- 210000003625 skull Anatomy 0.000 abstract description 3
- 230000026683 transduction Effects 0.000 abstract 1
- 238000010361 transduction Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Images
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
- H04R1/46—Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope
-
- 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
- H04R17/025—Microphones using a piezoelectric polymer
Definitions
- the present invention relates to a piezoelectric contact microphone.
- This sensor can be used as a laryngophone and as a bone or mechanical solidary vibration sensor.
- the operation of the present invention will be described in its use as a bone vibration sensor when it is placed on the head at the top of the speaker's cranial box, the other uses being deduced in an obvious manner.
- the transducer object of the present invention allows the transmission of the speech of a subject placed in unfavorable environmental conditions. It sometimes happens that in various circumstances it is not possible to use an ordinary proximity microphone.
- the object of the invention is therefore a sensor contact microphone comprising a polymer piezo membrane with metallized faces disposed between a thin plastic plate and a plate acting as an "anvil", both provided with grooves on their facing faces which concentrically stretch the polymer piezo film and a electronic preamplifier circuit, characterized in that said membrane consists of a piezo-polymer film, the two faces of which are metallized forming the armatures of a capacitor so that the potential difference which is established between the two armatures constitutes the signal sent to the amplifier and from there to the outside, and also characterized in that the said membrane is slightly pretended by the grooves of the facing plastic plates.
- the vibrations of the skull bones generated by the subject's voice are transmitted to the external hard plastic wafer.
- This external plate being slightly projecting relative to the housing and having a thinned peripheral zone, moves around its rest position during vibrations.
- the grooves of the two plates are offset, so that the projecting grooved part of the external plate, comes to fit in the groove of the groove of the internal plate and vice versa which keeps the piezo polymer film in permanent contact with the two plates.
- any impulse transmitted by the cranial bone tends to push the projecting part into the groove of the internal plate which produces a deformation of the piezoelectric film.
- this deformation generates electric charges on the faces of the piezo polymer film.
- These charges collected by the metal faces of the film, create a potential difference, across the terminals of the polarized solid dielectric capacitor that constitutes the film used, which is amplified by the preamplifier built into the transducer.
- the signal is then sent outside of said transducer.
- the plastic plate situated outside 2 can be protected against any external attack as well as for reasons of comfort by a thin layer of protective material (rubber for example).
- the invention may be better understood by referring to an exemplary embodiment which is in no way limitative in which the sensor assumes the cylindrical shape and in which the grooves of the two plates are concentric circles and which will be described below with reference to the figure. unique.
- the piezo polymer film 5 with metallized faces 4 and 6 is held on the metal ring 7 of the lower plate 8 (provided with circular grooves 13) by the ring 7. Then stacked successively in the casing 1, the upper plate 2 (provided circular grooves 14), the piezo-polymer film assembly, housing, lower plate described above, a metal spacer 9 containing the preamplifier 11 and a closure part 10 pierced with holes 12 for the output of the conductors from the amplifier which transmit the signal received to the outside.
- the sensitive piezo polymer film used consists of a piezoelectric polymer layer 5, each of the faces of which is metallized 4 and 6.
- a vibration propagates through the bones of the skull and induces a displacement of the plate 2 and its projecting parts 14 relative to the part (8 with grooves 13) serving as anvil.
- a series of sounds corresponding to a sentence will correspond to a succession of electrical signals.
- the signal thus obtained will be too weak to be used directly.
- This signal is therefore directed to a correcting preamplifier with very high input impedance.
- the signal from the preamplifier will be taken by conductors passing through the closure plate through one or two openings such as 12.
- the sensitive layer is constituted by a piezoelectric polymer film of the polyvinylfluoride type. It will have a thickness of a few tens of microns. Films of this type are found commercially covered on both sides with a metallized layer (AR, Ni, Au, etc.) having very satisfactory adhesion to the polymer in most cases.
- a metallized layer AR, Ni, Au, etc.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8506663A FR2581496B1 (fr) | 1985-05-02 | 1985-05-02 | Capteur microphonique de contact a membrane piezo polymere |
FR8506663 | 1985-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0201421A1 true EP0201421A1 (de) | 1986-11-12 |
Family
ID=9318883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86400958A Withdrawn EP0201421A1 (de) | 1985-05-02 | 1986-04-30 | Körperschallaufnehmer mit einer piezopolymeren Membran |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0201421A1 (de) |
FR (1) | FR2581496B1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623587A1 (de) * | 1986-07-12 | 1988-01-21 | Gerd Kress | Geraet zum messen der betriebszeit von maschinen |
EP0334219A2 (de) * | 1988-03-21 | 1989-09-27 | M-P & SD DI-PARISI EUGENIO MARKETING PROMOTION & SYSTEMS DEVELOPMENT | Kontaktmikrophon |
EP0390758A2 (de) * | 1989-03-06 | 1990-10-03 | Leif Palmaer | Kontaktmikrophon-Verstärker |
WO1995006525A1 (en) * | 1993-08-30 | 1995-03-09 | Medacoustics, Inc. | Disposable acoustic pad sensors |
WO2000010462A1 (en) * | 1998-08-20 | 2000-03-02 | Medacoustics, Inc. | Thin film piezoelectric polymer sensor |
US6193668B1 (en) | 1997-11-10 | 2001-02-27 | Medacoustics, Inc. | Acoustic sensor array for non-invasive detection of coronary artery disease |
US6243599B1 (en) | 1997-11-10 | 2001-06-05 | Medacoustics, Inc. | Methods, systems and computer program products for photogrammetric sensor position estimation |
US20100290660A1 (en) * | 2008-02-08 | 2010-11-18 | Temco Japan Co., Ltd. | Vibration pickup microphone |
CN1997243B (zh) * | 2005-12-31 | 2011-07-27 | 财团法人工业技术研究院 | 可挠式扬声器及其制法 |
WO2018104807A1 (en) * | 2016-12-05 | 2018-06-14 | Sateco Ag | Button assemblies |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3816774A (en) * | 1972-01-28 | 1974-06-11 | Victor Company Of Japan | Curved piezoelectric elements |
NL7508534A (en) * | 1975-07-17 | 1977-01-19 | Philips Nv | Transducer for loudspeakers or microphones - provided with independently acting but adjacently located transducer membrane films |
US4056742A (en) * | 1976-04-30 | 1977-11-01 | Tibbetts Industries, Inc. | Transducer having piezoelectric film arranged with alternating curvatures |
DE3022770A1 (de) * | 1980-06-18 | 1981-12-24 | Helmut 8501 Feucht Schaller | Piezokeramischer tonabnehmer |
FR2507424A1 (fr) * | 1981-06-05 | 1982-12-10 | Cgr | Transducteur piezoelectrique autocollant et dispositif de mise en oeuvre du transducteur |
-
1985
- 1985-05-02 FR FR8506663A patent/FR2581496B1/fr not_active Expired
-
1986
- 1986-04-30 EP EP86400958A patent/EP0201421A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3816774A (en) * | 1972-01-28 | 1974-06-11 | Victor Company Of Japan | Curved piezoelectric elements |
NL7508534A (en) * | 1975-07-17 | 1977-01-19 | Philips Nv | Transducer for loudspeakers or microphones - provided with independently acting but adjacently located transducer membrane films |
US4056742A (en) * | 1976-04-30 | 1977-11-01 | Tibbetts Industries, Inc. | Transducer having piezoelectric film arranged with alternating curvatures |
DE3022770A1 (de) * | 1980-06-18 | 1981-12-24 | Helmut 8501 Feucht Schaller | Piezokeramischer tonabnehmer |
FR2507424A1 (fr) * | 1981-06-05 | 1982-12-10 | Cgr | Transducteur piezoelectrique autocollant et dispositif de mise en oeuvre du transducteur |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623587A1 (de) * | 1986-07-12 | 1988-01-21 | Gerd Kress | Geraet zum messen der betriebszeit von maschinen |
EP0334219A2 (de) * | 1988-03-21 | 1989-09-27 | M-P & SD DI-PARISI EUGENIO MARKETING PROMOTION & SYSTEMS DEVELOPMENT | Kontaktmikrophon |
EP0334219A3 (de) * | 1988-03-21 | 1991-04-03 | M-P & SD DI-PARISI EUGENIO MARKETING PROMOTION & SYSTEMS DEVELOPMENT | Kontaktmikrophon |
EP0390758A2 (de) * | 1989-03-06 | 1990-10-03 | Leif Palmaer | Kontaktmikrophon-Verstärker |
EP0390758A3 (de) * | 1989-03-06 | 1991-11-13 | Leif Palmaer | Kontaktmikrophon-Verstärker |
US5885222A (en) * | 1993-08-30 | 1999-03-23 | Medacoustics, Inc. | Disposable acoustic pad sensors |
WO1995006525A1 (en) * | 1993-08-30 | 1995-03-09 | Medacoustics, Inc. | Disposable acoustic pad sensors |
US6193668B1 (en) | 1997-11-10 | 2001-02-27 | Medacoustics, Inc. | Acoustic sensor array for non-invasive detection of coronary artery disease |
US6243599B1 (en) | 1997-11-10 | 2001-06-05 | Medacoustics, Inc. | Methods, systems and computer program products for photogrammetric sensor position estimation |
WO2000010462A1 (en) * | 1998-08-20 | 2000-03-02 | Medacoustics, Inc. | Thin film piezoelectric polymer sensor |
US6278890B1 (en) | 1998-11-09 | 2001-08-21 | Medacoustics, Inc. | Non-invasive turbulent blood flow imaging system |
CN1997243B (zh) * | 2005-12-31 | 2011-07-27 | 财团法人工业技术研究院 | 可挠式扬声器及其制法 |
US20100290660A1 (en) * | 2008-02-08 | 2010-11-18 | Temco Japan Co., Ltd. | Vibration pickup microphone |
WO2018104807A1 (en) * | 2016-12-05 | 2018-06-14 | Sateco Ag | Button assemblies |
US11025251B2 (en) * | 2016-12-05 | 2021-06-01 | Sateco Ag | Button assemblies |
Also Published As
Publication number | Publication date |
---|---|
FR2581496B1 (fr) | 1987-06-26 |
FR2581496A1 (fr) | 1986-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE GB IT LI LU NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19870513 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DE FLEURIEU, BRUNO Inventor name: CHERQUI, JOSE |