IT982996B - IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE - Google Patents

IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE

Info

Publication number
IT982996B
IT982996B IT49299/73A IT4929973A IT982996B IT 982996 B IT982996 B IT 982996B IT 49299/73 A IT49299/73 A IT 49299/73A IT 4929973 A IT4929973 A IT 4929973A IT 982996 B IT982996 B IT 982996B
Authority
IT
Italy
Prior art keywords
improvement
active element
piezoelectric type
electroacoustic transducers
electroacoustic
Prior art date
Application number
IT49299/73A
Other languages
Italian (it)
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of IT982996B publication Critical patent/IT982996B/en

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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
IT49299/73A 1972-04-10 1973-04-06 IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE IT982996B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24250172A 1972-04-10 1972-04-10

Publications (1)

Publication Number Publication Date
IT982996B true IT982996B (en) 1974-10-21

Family

ID=22915023

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49299/73A IT982996B (en) 1972-04-10 1973-04-06 IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE

Country Status (11)

Country Link
US (1) US3786202A (en)
JP (1) JPS5338924B2 (en)
AU (1) AU5415873A (en)
BE (1) BE798009A (en)
CA (1) CA991304A (en)
DE (2) DE7313564U (en)
FR (1) FR2179883B1 (en)
GB (1) GB1399766A (en)
HK (1) HK74978A (en)
IT (1) IT982996B (en)
NL (1) NL173699C (en)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035672A (en) * 1975-02-06 1977-07-12 Cts Corporation Acoustic transducer with a dual purpose piezoelectric element
JPS5437135U (en) * 1977-08-18 1979-03-10
GB2018548B (en) * 1978-04-07 1982-06-16 Matsushita Electric Ind Co Ltd Piezoelectric speaker
JPS5825677Y2 (en) * 1978-04-07 1983-06-02 松下電器産業株式会社 piezoelectric speaker
DE2831377A1 (en) * 1978-07-17 1980-01-31 Siemens Ag ELECTROACOUSTIC CONVERTER
DE2831362A1 (en) * 1978-07-17 1980-01-31 Siemens Ag ELECTROACOUSTIC CONVERTER
JPS5911237B2 (en) * 1979-08-16 1984-03-14 株式会社精工舎 piezoelectric speaker
DE3005708C2 (en) * 1980-02-15 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Transducer plate for piezoelectric transducers
EP0057193A1 (en) * 1980-08-11 1982-08-11 Motorola, Inc. Apparatus and method for enhancing the frequency response of a loudspeaker
JPS6025956B2 (en) * 1980-12-10 1985-06-21 松下電器産業株式会社 Ultrasonic transducer
JPS5851697A (en) * 1981-09-22 1983-03-26 Matsushita Electric Ind Co Ltd Ultrasonic wave transceiver
US4607186A (en) * 1981-11-17 1986-08-19 Matsushita Electric Industrial Co. Ltd. Ultrasonic transducer with a piezoelectric element
US4458170A (en) * 1981-12-08 1984-07-03 Matsushita Electric Industrial Co., Ltd. Ultrasonic transmitter-receiver
US4418248A (en) * 1981-12-11 1983-11-29 Koss Corporation Dual element headphone
US4414436A (en) * 1982-04-19 1983-11-08 Pioneer Speaker Components, Inc. Narrow-frequency band acoustic transducer
US4461930A (en) * 1982-09-23 1984-07-24 Pioneer Speaker Components, Inc. Acoustic transducer with honeycomb diaphragm
JPS59130126U (en) * 1983-02-18 1984-09-01 小糸工業株式会社 data collection storage device
DE3306801A1 (en) * 1983-02-26 1984-09-06 Rainer J. 5000 Köln Haas Spherical high-frequency loudspeaker with piezoelectric drive
FR2574609A1 (en) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Piezoelectric element for radio loudspeaker - includes piezoelectric plate with main and auxiliary weights attached to visco-elastic layers on opposed faces
GB2166022A (en) * 1984-09-05 1986-04-23 Sawafuji Dynameca Co Ltd Piezoelectric vibrator
FR2574610A1 (en) * 1984-09-05 1986-06-13 Sawafuji Dynameca Co Ltd Piezoelectric loudspeaker - with two weights joined by viscoelastic layers and connecting rod
US5193119A (en) * 1985-09-02 1993-03-09 Franco Tontini Multiple loudspeaker
JPH0749914Y2 (en) * 1986-01-29 1995-11-13 株式会社村田製作所 Ultrasonic transducer
DE4120681A1 (en) * 1990-08-04 1992-02-06 Bosch Gmbh Robert ULTRASONIC CONVERTER
US5652801A (en) * 1994-05-02 1997-07-29 Aura Systems, Inc. Resonance damper for piezoelectric transducer
US5828768A (en) * 1994-05-11 1998-10-27 Noise Cancellation Technologies, Inc. Multimedia personal computer with active noise reduction and piezo speakers
US5638456A (en) * 1994-07-06 1997-06-10 Noise Cancellation Technologies, Inc. Piezo speaker and installation method for laptop personal computer and other multimedia applications
US5444324A (en) * 1994-07-25 1995-08-22 Western Atlas International, Inc. Mechanically amplified piezoelectric acoustic transducer
FR2734685B1 (en) * 1995-05-23 1997-08-14 Silec Liaisons Elec PIEZOELECTRIC SPEAKER
US5901231A (en) 1995-09-25 1999-05-04 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
JPH10294995A (en) * 1997-04-21 1998-11-04 Matsushita Electric Ind Co Ltd Dripproof ultrasonic wave transmitter
US6181797B1 (en) 1999-01-09 2001-01-30 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
GB2404779B (en) * 2003-08-07 2005-08-03 Sonic Age Ltd Electro-acoustic device for creating patterns of particulate matter
US8354773B2 (en) * 2003-08-22 2013-01-15 Siemens Medical Solutions Usa, Inc. Composite acoustic absorber for ultrasound transducer backing material
JP4696487B2 (en) * 2004-07-15 2011-06-08 リコープリンティングシステムズ株式会社 RECORDING HEAD AND INKJET RECORDING DEVICE HAVING THE SAME
US7415121B2 (en) * 2004-10-29 2008-08-19 Sonion Nederland B.V. Microphone with internal damping
CN102124643B (en) * 2008-07-14 2014-04-02 株式会社村田制作所 Piezoelectric power generation device
WO2010064712A1 (en) * 2008-12-04 2010-06-10 株式会社村田製作所 Ultrasonic wave transmitter/receiver
KR20120068613A (en) * 2010-12-17 2012-06-27 삼성전기주식회사 Piezoelectric actuator
CN104335602B (en) * 2012-08-10 2017-11-14 京瓷株式会社 Sound equipment generator, sound equipment generation device and electronic equipment
US9880671B2 (en) * 2013-10-08 2018-01-30 Sentons Inc. Damping vibrational wave reflections
WO2016118874A1 (en) * 2015-01-23 2016-07-28 Knowles Electronics, Llc Piezoelectric speaker driver
KR101756673B1 (en) * 2016-06-07 2017-07-25 주식회사 이엠텍 Microspeaker enclosure with porous material in resonance space
KR101788111B1 (en) * 2016-06-09 2017-10-20 주식회사 이엠텍 Microspeaker enclosure with porous material in resonance space

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518331A (en) * 1948-05-06 1950-08-08 Bell Telephone Labor Inc Piezoelectric crystal mounting
FR1376306A (en) * 1963-02-07 1964-10-23 Brown Ltd S G Improvements to electro-acoustic transducers
GB1159337A (en) * 1966-06-13 1969-07-23 Motorola Inc Piezoelectric Transducers
US3588381A (en) * 1967-08-28 1971-06-28 Motorola Inc Transducer having spaced apart oppositely flexing piezoelectric members
NL6813996A (en) * 1968-09-30 1970-04-01
US3698993A (en) * 1971-03-29 1972-10-17 Sonix Inc Sound deadening sheet material

Also Published As

Publication number Publication date
DE7313564U (en) 1973-11-22
BE798009A (en) 1973-10-10
HK74978A (en) 1978-12-29
US3786202A (en) 1974-01-15
FR2179883A1 (en) 1973-11-23
JPS4910719A (en) 1974-01-30
DE2318027B2 (en) 1975-03-20
CA991304A (en) 1976-06-15
AU5415873A (en) 1974-10-10
GB1399766A (en) 1975-07-02
NL173699C (en) 1984-02-16
DE2318027A1 (en) 1973-11-08
DE2318027C3 (en) 1975-10-30
NL7305005A (en) 1973-10-12
FR2179883B1 (en) 1979-09-28
JPS5338924B2 (en) 1978-10-18

Similar Documents

Publication Publication Date Title
IT982996B (en) IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS WITH ACTIVE ELEMENT OF PIEZOELECTRIC TYPE
AT349796B (en) PIEZOELECTRIC PRESSURE TRANSDUCER
IT1002250B (en) UNDERWATER ELECTROACOUSTIC TRANSDUCER
FR1522700A (en) Piezoelectric transducer
AT351301B (en) PIEZO TRANSDUCER-AMPLIFIER ARRANGEMENT
IT986369B (en) ELECTROACOUSTIC TRANSDUCER
IT1008673B (en) IMPROVEMENT IN ELECTRO ACOUSTIC TRANSDUCERS
IT972504B (en) PERFECTION IN ELECTROACOUSTIC TRANSDUCERS
CH515499A (en) Piezoelectric pressure transducer
IT989118B (en) ELECTROACOUSTIC TRANSDUCER
IT945061B (en) IMPROVEMENT IN ELECTROMECHANICAL OR ELECTROACOUSTIC TRANSDUCERS OF THE PIEZOELECTRIC TYPE
IT976236B (en) MAGNETOELASTIC TRANSDUCER
IT989265B (en) IMPROVEMENT IN HARROWS
IT990177B (en) IMPROVEMENT IN ANTI-EXPLOSION PRESSURE TRANSDUCERS
AT327294B (en) PIEZOELECTRIC FILTER ARRANGEMENT
IT961893B (en) IMPROVEMENT IN ELECTROACOUSTIC TRANSDUCERS OF THE ELECTRO-STATIC TYPE
IT984711B (en) VIBRATING ELEMENT TO GENERATE DIRECTIONAL VIBRATIONS
IT977362B (en) IMPROVEMENT IN ANGULAR POSITION TRANSDUCERS
IT979752B (en) PIEZOELECTRIC TRANSDUCER
AT341577B (en) PIEZOELECTRIC RESONATOR
CH540722A (en) Piezoelectric transducer
IT965193B (en) IMPROVEMENT IN PIEZOELECTRIC TRANSDUCERS
BE796100A (en) ELECTROACOUSTIC TRANSDUCER
IT990176B (en) IMPROVEMENT IN BOURDON TYPE MANOMETERS
IT999333B (en) TRANSDUCERS