GB705080A - Improvements in or relating to ultra-sonic wave absorption apparatus - Google Patents

Improvements in or relating to ultra-sonic wave absorption apparatus

Info

Publication number
GB705080A
GB705080A GB1343351A GB1343351A GB705080A GB 705080 A GB705080 A GB 705080A GB 1343351 A GB1343351 A GB 1343351A GB 1343351 A GB1343351 A GB 1343351A GB 705080 A GB705080 A GB 705080A
Authority
GB
United Kingdom
Prior art keywords
cell
face
ultra
reflections
transducer
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
GB1343351A
Inventor
Wilfrid Sinden Mortley
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB1343351A priority Critical patent/GB705080A/en
Publication of GB705080A publication Critical patent/GB705080A/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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Aerials With Secondary Devices (AREA)
  • Liquid Crystal (AREA)

Abstract

705,080. Piezo-electric crystals. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 14, 1952 [June 6, 1951], No. 13433/51. Class 40 (8) An ultra-sonic absorbtion cell for absorbing ultra-sonic wave energy from a quartz &c. transducer 3 comprises an elongated member 1 made of a material similar to that of the transducer and of similar r crystallographic orientation, the member being so shaped, dimensioned and positioned as to subject the waves to a large number of reflections in its interior. The cell shown in Fig. 1 has a sloping end face 1d, the crystal 3 being mounted in intimate physical contact with the plane face 1b. If the end face 1c is inclined slightly to the face 1b a larger number of reflections is obtained. The cell may also be in the form of an exponential horn, Fig. 3, or a cone, Fig. 4 (not shown). The cell may be coated with or immersed in an absorbent semi-liquid such as wax or pitch. Alternatively, for the same purpose. a thick. fired-on spongy silver film preferably coated with solder may be used. An outer coating of bituminous material may be applied to such a coating.
GB1343351A 1951-06-06 1951-06-06 Improvements in or relating to ultra-sonic wave absorption apparatus Expired GB705080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1343351A GB705080A (en) 1951-06-06 1951-06-06 Improvements in or relating to ultra-sonic wave absorption apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1343351A GB705080A (en) 1951-06-06 1951-06-06 Improvements in or relating to ultra-sonic wave absorption apparatus

Publications (1)

Publication Number Publication Date
GB705080A true GB705080A (en) 1954-03-10

Family

ID=10022902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1343351A Expired GB705080A (en) 1951-06-06 1951-06-06 Improvements in or relating to ultra-sonic wave absorption apparatus

Country Status (1)

Country Link
GB (1) GB705080A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207681B (en) * 1962-06-22 1965-12-23 Lehfeldt & Co G M B H Dr Ultrasonic treatment device for long or large objects
US3680008A (en) * 1969-12-06 1972-07-25 Victor Company Of Japan Ultrasonic wave delay device having a trap zone for undesired signal components
EP0339746A2 (en) * 1988-04-29 1989-11-02 Shell Internationale Researchmaatschappij B.V. Acoustic transducer backing in the shape of a Wood's horn

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1207681B (en) * 1962-06-22 1965-12-23 Lehfeldt & Co G M B H Dr Ultrasonic treatment device for long or large objects
US3680008A (en) * 1969-12-06 1972-07-25 Victor Company Of Japan Ultrasonic wave delay device having a trap zone for undesired signal components
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

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