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Titolo:
MEASUREMENT OF ACOUSTIC VELOCITY IN SILIC A AEROGELS
Autore:
HANNOUN P; GIBIAT V; WOYGNIER T; PELOUS J;
Indirizzi:
ESPCI,LOA,10 RUE VAUQUELIN F-75005 PARIS FRANCE LSMV F-34095 MONTPELLIER FRANCE
Titolo Testata:
Journal de physique. IV
fascicolo: C5, volume: 4, anno: 1994,
parte:, 1
pagine: 229 - 232
SICI:
1155-4339(1994)4:C5<229:MOAVIS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
FRE
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
6
Recensione:
Indirizzi per estratti:
Citazione:
P. Hannoun et al., "MEASUREMENT OF ACOUSTIC VELOCITY IN SILIC A AEROGELS", Journal de physique. IV, 4(C5), 1994, pp. 229-232

Abstract

The use of silica aerogels as a quarter wave layer for impedance matching of air acoustical transducers has been pointed by FRICKE and AL. in 1986. Their recent published results in 1999 proves the ability andthe interest of this approach. Following the same idea, if one want to built efficient transducers, one need precise mesurements of the acoustical properties of a great number of silica aerogel samples. We have choosen a systematical way to verify their properties and find pregnant materials to obtain a good impedance matching in the low ultrasonic range ( 20 kHz - 300 kHz ) between piezoelectric material and air. Mesured acoustical impedance and sound velocity of a wide range of silica aerogel will be presented as preliminar results.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 17:54:43