DE2821573C2 - - Google Patents

Info

Publication number
DE2821573C2
DE2821573C2 DE19782821573 DE2821573A DE2821573C2 DE 2821573 C2 DE2821573 C2 DE 2821573C2 DE 19782821573 DE19782821573 DE 19782821573 DE 2821573 A DE2821573 A DE 2821573A DE 2821573 C2 DE2821573 C2 DE 2821573C2
Authority
DE
Germany
Prior art keywords
acoustic
sound transmission
transmission surface
flat
excitation means
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
DE19782821573
Other languages
German (de)
English (en)
Other versions
DE2821573A1 (de
Inventor
Eric Albert Ash
Simon David London Gb Bennett
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Publication of DE2821573A1 publication Critical patent/DE2821573A1/de
Application granted granted Critical
Publication of DE2821573C2 publication Critical patent/DE2821573C2/de
Granted 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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
DE19782821573 1977-05-17 1978-05-17 Akustische vorrichtung Granted DE2821573A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2071377A GB1602741A (en) 1977-05-17 1977-05-17 Acoustic test devices

Publications (2)

Publication Number Publication Date
DE2821573A1 DE2821573A1 (de) 1978-12-21
DE2821573C2 true DE2821573C2 (fr) 1987-09-17

Family

ID=10150440

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782821573 Granted DE2821573A1 (de) 1977-05-17 1978-05-17 Akustische vorrichtung

Country Status (3)

Country Link
JP (1) JPS5417701A (fr)
DE (1) DE2821573A1 (fr)
GB (1) GB1602741A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367648A (en) * 1980-03-25 1983-01-11 National Research Development Corporation Dark field viewing apparatus
JPS6249860A (ja) * 1985-08-29 1987-03-04 日本赤十字社 採漿装置
JPS63255878A (ja) * 1987-04-10 1988-10-24 Matsushita Electric Ind Co Ltd 光学ヘツド支持装置
JPS63304475A (ja) * 1987-06-04 1988-12-12 Matsushita Electric Ind Co Ltd 光学ヘッド支持装置
JPS6486375A (en) * 1987-09-28 1989-03-31 Matsushita Electric Ind Co Ltd Optical head supporting device
JPH01109576A (ja) * 1987-10-22 1989-04-26 Matsushita Electric Ind Co Ltd 光学ヘッド支持装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB684418A (en) * 1949-04-21 1952-12-17 Brush Dev Focused electromechanical transducing device

Also Published As

Publication number Publication date
JPS5417701A (en) 1979-02-09
GB1602741A (en) 1981-11-18
JPS6145772B2 (fr) 1986-10-09
DE2821573A1 (de) 1978-12-21

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee