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1. (WO1991018486) A COUPLING DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018486 International Application No.: PCT/AU1991/000206
Publication Date: 28.11.1991 International Filing Date: 14.05.1991
Chapter 2 Demand Filed: 27.11.1991
IPC:
G10K 11/02 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
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
02
Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
Applicants:
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION [AU/AU]; Limestone Avenue Campbell, ACT 2601, AU (AllExceptUS)
AGL CONSULTANCY PTY. LTD. [AU/AU]; 111 Pacific Highway North Sydney, NSW 2060, AU (AllExceptUS)
THWAITES, Suszanne [AU/AU]; AU (UsOnly)
FLETCHER, Neville, Horner [AU/AU]; AU (UsOnly)
Inventors:
THWAITES, Suszanne; AU
FLETCHER, Neville, Horner; AU
Agent:
SPRUSON & FERGUSON; G.P.O. Box 3898 Sydney, NSW 2001, AU
Priority Data:
PK 012414.05.1990AU
Title (EN) A COUPLING DEVICE
(FR) DISPOSITIF DE COUPLAGE
Abstract:
(EN) A device for matching acoustic impedance between an ultrasonic transducer (21) and a medium is disclosed. The device includes a body (20) comprising a material having a high acoustic impedance on an ultrasonic signal. The body contains a plurality of acoustic impedance matching horns (23) extending between two surfaces of the body wherein the mouths of the horns are disposed in one surface and the throats of the horns are disposed in another surface, the magnitudes of the lengths and flares of the horns are such that the horns are capable of transmitting the ultrasonic signal; and the magnitude of the flare of each horn is such so as to provide a substantially smooth transition in acoustic impedance to the ultrasonic signal between the mouth and throat of the horn.
(FR) Un dispositif destiné à faire correspondre l'impédance acoustique d'un transducteur ultrasonique (21) et celle d'un milieu est décrit. Le dispositif comprend un corps (20) composé d'un matériau possédant une impédance acoustique élevée à un signal ultrasonique. Le corps contient une multiplicité de pavillons (23) servant à faire correspondre l'impédance acoustique et s'étendant entre deux surfaces du corps, de telle sorte que les embouchures des pavillons sont disposées sur une surface et les cols des pavillons sur une autre surface. La grandeur des pavillons, en ce qui concerne leur longueur et leur évasement, est telle qu'ils peuvent transmettre le signal ultrasonique, et la grandeur de l'évasement de chaque pavillon est telle qu'il permet au signal acoustique d'effectuer une transition pratiquement sans heurts dans l'impédance acoustique, entre l'embouchure et le col du pavillon.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, PL, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0528910AU1991078641