IT1125948B - Trasduttore elettroacustico particolarmente per sistemi di allarme antifurto - Google Patents

Trasduttore elettroacustico particolarmente per sistemi di allarme antifurto

Info

Publication number
IT1125948B
IT1125948B IT68718/79A IT6871879A IT1125948B IT 1125948 B IT1125948 B IT 1125948B IT 68718/79 A IT68718/79 A IT 68718/79A IT 6871879 A IT6871879 A IT 6871879A IT 1125948 B IT1125948 B IT 1125948B
Authority
IT
Italy
Prior art keywords
electroacoustic transducer
burglar alarm
alarm systems
transducer particularly
systems
Prior art date
Application number
IT68718/79A
Other languages
English (en)
Italian (it)
Other versions
IT7968718A0 (it
Inventor
John Kenneth Guscott
Gerard Renner
Roger Wendt
Original Assignee
American District Telegraph Co
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 American District Telegraph Co filed Critical American District Telegraph Co
Publication of IT7968718A0 publication Critical patent/IT7968718A0/it
Application granted granted Critical
Publication of IT1125948B publication Critical patent/IT1125948B/it

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
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
IT68718/79A 1978-08-28 1979-08-27 Trasduttore elettroacustico particolarmente per sistemi di allarme antifurto IT1125948B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/937,126 US4228379A (en) 1978-08-28 1978-08-28 Diaphragm type piezoelectric electroacoustic transducer

Publications (2)

Publication Number Publication Date
IT7968718A0 IT7968718A0 (it) 1979-08-27
IT1125948B true IT1125948B (it) 1986-05-14

Family

ID=25469538

Family Applications (1)

Application Number Title Priority Date Filing Date
IT68718/79A IT1125948B (it) 1978-08-28 1979-08-27 Trasduttore elettroacustico particolarmente per sistemi di allarme antifurto

Country Status (5)

Country Link
US (1) US4228379A (OSRAM)
JP (1) JPS5563197A (OSRAM)
DE (1) DE2934663A1 (OSRAM)
GB (1) GB2029160B (OSRAM)
IT (1) IT1125948B (OSRAM)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337640A (en) * 1979-04-10 1982-07-06 Nissan Motor Co., Ltd. Knocking sensor
JPS5890698A (ja) * 1981-11-25 1983-05-30 松下電器産業株式会社 発音装置
FR2537783B1 (fr) * 1982-12-10 1985-05-31 Thomson Csf Mat Tel Capsule pour vibreur piezoelectrique
US4533907A (en) * 1983-05-09 1985-08-06 Thatcher John B Swimming pool alarm
US4691418A (en) * 1986-08-11 1987-09-08 Medasonics Inc. Ultrasonic transducer method
US5185728A (en) * 1990-10-31 1993-02-09 Cyber Scientific Omnidirectional ultrasonic transducer
JP3158809B2 (ja) * 1993-09-28 2001-04-23 株式会社村田製作所 超音波センサ
US5514927A (en) * 1994-02-28 1996-05-07 Motorola, Inc. Piezoelectric audio transducer
US5938404A (en) * 1997-06-05 1999-08-17 Mcdonnell Douglas Helicopter Company Oscillating air jets on aerodynamic surfaces
US6543719B1 (en) 1997-06-05 2003-04-08 Mcdonnell Douglas Helicopter Co. Oscillating air jets for implementing blade variable twist, enhancing engine and blade efficiency, and reducing drag, vibration, download and ir signature
DE19744229A1 (de) * 1997-10-07 1999-04-29 Bosch Gmbh Robert Ultraschallwandler
JP3721798B2 (ja) * 1998-01-13 2005-11-30 株式会社村田製作所 超音波センサ
US6478541B1 (en) 2001-08-16 2002-11-12 The Boeing Company Tapered/segmented flaps for rotor blade-vortex interaction (BVI) noise and vibration reduction
DE10158015B4 (de) * 2001-11-27 2010-10-14 Hydrometer Gmbh Ultraschallwandler und Durchflussmesser
FI116097B (fi) * 2002-08-21 2005-09-15 Heikki Ruotoistenmaeki Voima- tai paineanturi ja menetelmä sen soveltamiseksi
JP2004117281A (ja) * 2002-09-27 2004-04-15 Mitsubishi Electric Corp 傾斜角度測定装置
EP1583391A1 (en) * 2004-04-01 2005-10-05 Sony Ericsson Mobile Communications AB A communications unit with arrangment for loud reproduction of sound
DE102006041975A1 (de) * 2006-09-07 2008-03-27 Hella Kgaa Hueck & Co. Ultraschallsensor und Verfahren zur Herstellung eines Ultraschallsensors
WO2008147325A1 (en) * 2007-06-01 2008-12-04 Axsensor Ab Piezoelectric transducer device
DE202012003185U1 (de) * 2012-03-29 2012-05-18 Vega Grieshaber Kg Schwingvorrichtung für eine Füllstandsmesseinheit
DE102012209238A1 (de) 2012-05-31 2013-12-05 Robert Bosch Gmbh Ultraschallsensor sowie Vorrichtung und Verfahren zur Messung eines Abstands zwischen einem Fahrzeug und einem Hindernis
JP5620616B2 (ja) * 2012-09-21 2014-11-05 京セラ株式会社 音響発生器、音響発生装置及び電子機器
US10448165B2 (en) 2014-04-17 2019-10-15 Nokia Technologies Oy Audio transducer with electrostatic discharge protection
EP3776526B1 (en) 2018-03-30 2024-10-16 Carrier Corporation Temperature compensation for piezo sounder
IL321087A (en) * 2018-05-02 2025-07-01 Ultrahaptics Ip Ltd Blocking plate structure for improved acoustic transmission efficiency
JP7806491B2 (ja) * 2021-12-27 2026-01-27 株式会社リコー 音響変換器、音響機器および超音波発振器

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967957A (en) * 1957-09-17 1961-01-10 Massa Frank Electroacoustic transducer
US3058539A (en) * 1958-05-15 1962-10-16 Zenith Radio Corp Transducer with impedance-matching bridge
US3253674A (en) * 1961-09-11 1966-05-31 Zenith Radio Corp Ceramic microphone
CA941949A (en) * 1969-06-25 1974-02-12 Automation Industries Air coupled nondestructive material tester with reflected wave cancellation
US3638052A (en) * 1969-09-22 1972-01-25 Dynamics Corp America Electroacoustic transducers of the bilaminar flexural vibrating type
US3849679A (en) * 1970-02-12 1974-11-19 Dynamics Corp Massa Div Electroacoustic transducer with controlled beam pattern
US3761956A (en) * 1970-10-01 1973-09-25 Nittan Co Ltd Sound generating device
GB1402290A (en) * 1971-12-29 1975-08-06 Sumitomo Electric Industries Piezo-electric acoustic device
DE2202254C2 (de) * 1972-01-18 1974-01-24 Siemens Ag Elektroakustischer Wandler, insbesondere Mikrophon für Fernsprechanlagen
JPS4963860U (OSRAM) * 1972-06-26 1974-06-04
US3826333A (en) * 1973-03-21 1974-07-30 J Buckwalter Baffle for a sound producing device
CA1006969A (en) * 1973-07-26 1977-03-15 Lyle E. Shoot Piezoelectric transducer
US4033431A (en) * 1975-11-19 1977-07-05 Ebejer James G Acoustic crossover speaker enclosure
IT1066823B (it) * 1975-12-30 1985-03-12 Sits Soc It Telecom Siemens Trasduttore elettroacustico particolarmente del tipo a lamina piezoceramica

Also Published As

Publication number Publication date
US4228379A (en) 1980-10-14
JPS6340400B2 (OSRAM) 1988-08-10
GB2029160A (en) 1980-03-12
JPS5563197A (en) 1980-05-13
IT7968718A0 (it) 1979-08-27
GB2029160B (en) 1983-03-02
DE2934663A1 (de) 1980-03-13

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