EP0339746A3 - Acoustic transducer backing in the shape of a wood's horn - Google Patents

Acoustic transducer backing in the shape of a wood's horn Download PDF

Info

Publication number
EP0339746A3
EP0339746A3 EP19890201068 EP89201068A EP0339746A3 EP 0339746 A3 EP0339746 A3 EP 0339746A3 EP 19890201068 EP19890201068 EP 19890201068 EP 89201068 A EP89201068 A EP 89201068A EP 0339746 A3 EP0339746 A3 EP 0339746A3
Authority
EP
European Patent Office
Prior art keywords
horn
wood
shape
acoustic transducer
transducer backing
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Withdrawn
Application number
EP19890201068
Other languages
German (de)
French (fr)
Other versions
EP0339746A2 (en
Inventor
Frederick Henry Kreisler Rambow
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of EP0339746A2 publication Critical patent/EP0339746A2/en
Publication of EP0339746A3 publication Critical patent/EP0339746A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The unwanted acoustic energy from the back side of an acoustic transducer (25) is fully absorbed in a Wood's Horn styled acoustic energy trap (30) embedded in an acoustically absorbing material (35). Also, the impedance of the transducer (25) and backing (30) can be exactly matched, thereby increasing the frequency bandwidth.
EP19890201068 1988-04-29 1989-04-25 Acoustic transducer backing in the shape of a wood's horn Withdrawn EP0339746A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18775488A 1988-04-29 1988-04-29
US187754 1988-04-29

Publications (2)

Publication Number Publication Date
EP0339746A2 EP0339746A2 (en) 1989-11-02
EP0339746A3 true EP0339746A3 (en) 1991-07-03

Family

ID=22690329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890201068 Withdrawn EP0339746A3 (en) 1988-04-29 1989-04-25 Acoustic transducer backing in the shape of a wood's horn

Country Status (2)

Country Link
EP (1) EP0339746A3 (en)
NO (1) NO891761L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2743653A1 (en) * 2012-12-13 2014-06-18 Sick Ag Ultrasonic transducer and method for generating and/or detecting ultrasonic signals
AU2014415593B2 (en) * 2014-12-30 2018-04-12 Halliburton Energy Services, Inc. Adjustable acoustic transducers for a downhole tool
US20240118446A1 (en) * 2022-10-07 2024-04-11 Halliburton Energy Services, Inc. Wedge-Cut Backing Of Acoustic Transducer For Improved Attenuation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB705080A (en) * 1951-06-06 1954-03-10 Marconi Wireless Telegraph Co Improvements in or relating to ultra-sonic wave absorption apparatus
GB869582A (en) * 1957-08-19 1961-05-31 Chirana Praha Mechanical damping member for an electroacoustic transducer
US3403271A (en) * 1966-02-09 1968-09-24 Hewlett Packard Co Ultrasonic transducer with absorptive load

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB705080A (en) * 1951-06-06 1954-03-10 Marconi Wireless Telegraph Co Improvements in or relating to ultra-sonic wave absorption apparatus
GB869582A (en) * 1957-08-19 1961-05-31 Chirana Praha Mechanical damping member for an electroacoustic transducer
US3403271A (en) * 1966-02-09 1968-09-24 Hewlett Packard Co Ultrasonic transducer with absorptive load

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANS. ON SONICS AND ULTRASONICS, vol. SU-26, no. 2, March 1979, pages 140-142, New York, US; R.G. SWARTZ et al.: "An improved wedge-type backing for piezoelectric transducers" *

Also Published As

Publication number Publication date
NO891761L (en) 1989-10-30
EP0339746A2 (en) 1989-11-02
NO891761D0 (en) 1989-04-27

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