GB869582A - Mechanical damping member for an electroacoustic transducer - Google Patents

Mechanical damping member for an electroacoustic transducer

Info

Publication number
GB869582A
GB869582A GB26626/58A GB2662658A GB869582A GB 869582 A GB869582 A GB 869582A GB 26626/58 A GB26626/58 A GB 26626/58A GB 2662658 A GB2662658 A GB 2662658A GB 869582 A GB869582 A GB 869582A
Authority
GB
United Kingdom
Prior art keywords
inner part
transducer
damping member
taper
aug
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.)
Expired
Application number
GB26626/58A
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.)
Chirana Praha np
Original Assignee
Chirana Praha np
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 Chirana Praha np filed Critical Chirana Praha np
Publication of GB869582A publication Critical patent/GB869582A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

869,582. Ultrasonic probes. CHIRANA PRAHA, NARODNI PODNIK. Aug. 19, 1958 [Aug. 19, 1957], No. 26626/58. Class 40 (4). [Also in Group XL (b)] A damping member for improving the frequency response of a transducer in an ultrasonic probe comprises an inner part which contacts and forms an acoustic match with the back of the transducer, this inner part having a curvilinear taper and being surrounded by an outer part of lower acoustic impedance. The transducer 1 is of the piezo-electric type and is positioned on the surface of a test-piece 4. The inner and outer parts 6, 7 of the damping member are made respectively of an artificial resin loaded with powdered silver and of unloaded resin. The taper of the inner part is such that a tangent to any part of the parting surface 8 forms an angle of less than 75 degrees with the axis of the inner part. Under these conditions, part of the wave-energy transmitted into the inner part 6 from the back of the transducer, passes into the outer part 7 where it undergoes multiple reflection. The end 9 of the inner part may have an increased rate of taper. The end part 9 may be replaced by a conical depression 10, Fig. 3, filled with unloaded resin.
GB26626/58A 1957-08-19 1958-08-19 Mechanical damping member for an electroacoustic transducer Expired GB869582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS869582X 1957-08-19

Publications (1)

Publication Number Publication Date
GB869582A true GB869582A (en) 1961-05-31

Family

ID=5456335

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26626/58A Expired GB869582A (en) 1957-08-19 1958-08-19 Mechanical damping member for an electroacoustic transducer

Country Status (1)

Country Link
GB (1) GB869582A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567394A1 (en) * 1984-07-14 1986-01-17 Wolf Gmbh Richard PIEZOELECTRIC TRANSDUCER FOR THE DESTRUCTION OF CONCRETIONS WITHIN THE BODY
EP0222276A2 (en) * 1985-11-15 1987-05-20 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Ultrasonic measuring head
EP0339746A2 (en) * 1988-04-29 1989-11-02 Shell Internationale Researchmaatschappij B.V. Acoustic transducer backing in the shape of a Wood's horn
GB2232487A (en) * 1989-06-09 1990-12-12 Shimizu Construction Co Ltd Ultrasonic measuring apparatus including a damped transducer probe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567394A1 (en) * 1984-07-14 1986-01-17 Wolf Gmbh Richard PIEZOELECTRIC TRANSDUCER FOR THE DESTRUCTION OF CONCRETIONS WITHIN THE BODY
EP0222276A2 (en) * 1985-11-15 1987-05-20 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Ultrasonic measuring head
EP0222276A3 (en) * 1985-11-15 1988-09-28 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Ultrasonic measuring head
EP0339746A2 (en) * 1988-04-29 1989-11-02 Shell Internationale Researchmaatschappij B.V. Acoustic transducer backing in the shape of a Wood's horn
EP0339746A3 (en) * 1988-04-29 1991-07-03 Shell Internationale Researchmaatschappij B.V. Acoustic transducer backing in the shape of a wood's horn
GB2232487A (en) * 1989-06-09 1990-12-12 Shimizu Construction Co Ltd Ultrasonic measuring apparatus including a damped transducer probe
GB2232487B (en) * 1989-06-09 1993-08-04 Shimizu Construction Co Ltd Ultrasonic measuring apparatus including a high-damping probe

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