GB8924434D0 - Acoustic elements - Google Patents

Acoustic elements

Info

Publication number
GB8924434D0
GB8924434D0 GBGB8924434.7A GB8924434A GB8924434D0 GB 8924434 D0 GB8924434 D0 GB 8924434D0 GB 8924434 A GB8924434 A GB 8924434A GB 8924434 D0 GB8924434 D0 GB 8924434D0
Authority
GB
United Kingdom
Prior art keywords
acoustic elements
acoustic
elements
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.)
Ceased
Application number
GBGB8924434.7A
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.)
EMI Group Electronics Ltd
Original Assignee
Thorn EMI Electronics Ltd
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 Thorn EMI Electronics Ltd filed Critical Thorn EMI Electronics Ltd
Priority to GBGB8924434.7A priority Critical patent/GB8924434D0/en
Priority to FR9013534A priority patent/FR2855009A1/en
Publication of GB8924434D0 publication Critical patent/GB8924434D0/en
Ceased 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B06B1/0633—Cylindrical array
    • 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
    • G10K9/121—Flextensional transducers
    • 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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
GBGB8924434.7A 1989-10-31 1989-10-31 Acoustic elements Ceased GB8924434D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GBGB8924434.7A GB8924434D0 (en) 1989-10-31 1989-10-31 Acoustic elements
FR9013534A FR2855009A1 (en) 1989-10-31 1990-10-31 Towed floating hydrophone acoustic element having piezo electric polymer leaf buried following pull axis with pull axis along tubular length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB8924434.7A GB8924434D0 (en) 1989-10-31 1989-10-31 Acoustic elements

Publications (1)

Publication Number Publication Date
GB8924434D0 true GB8924434D0 (en) 2003-09-10

Family

ID=27840031

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB8924434.7A Ceased GB8924434D0 (en) 1989-10-31 1989-10-31 Acoustic elements

Country Status (2)

Country Link
FR (1) FR2855009A1 (en)
GB (1) GB8924434D0 (en)

Also Published As

Publication number Publication date
FR2855009A1 (en) 2004-11-19

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)