Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Hydroacoustics

1 1999

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Evaluation of a time reversal technique for low frequency acoustic measurements in a reverberant tank

Buogo S., Pitolli L., Cannelli G. B., Pontuale G.

Hydroacoustics

1999

Vol. 2

185--190

The objective of this work is to validate the efficiency of a recently proposed technique for acoustic measurements of transducer response. This technique allows measurements to be done in a reverberant tank at considerably lower frequencies than the limit imposed by free-field conditions. The method is based on time reversal, a concept originally developed for sound propagation in marine environment, that performs signal deconvolution. with a very little amount of data processing. It was seen that the method can be used to focus at a fixed point a transmit pulse several ms long, allowing calibrations down to the low kHz range in a 3-4 m tank. Early investigations already showed that the focusing of the acoustic field depends on the frequency. In this work, further measurements were done at the new tank facility of the Underwater Acoustics Laboratory at the Istituto di Acustica "O. M. Corbino" to evaluate the accuracy of the results.