Experimental verification of acoustic saturation

J. M. Sempsrott, W. D. O'Brien

Research output: Contribution to journalConference articlepeer-review

Abstract

The maximum value of acoustic pressure within an ultrasonic beam is limited by acoustic saturation. The theoretical basis for acoustic saturation has been analyzed previously. In this work, a high-power pulse source is used to drive acoustic pressure levels from an ultrasonic beam to saturation. An automatic procedure determines the field's beam axis using a calibrated Marconi PVDF hydrophone. The hydrophone measured RF waveforms are recorded along the beam axis and analyzed off-line. The peak compressional pressure is evaluated as a function of distance along the beam axis. The overall maximum pressure is compared to theoretical predictions. Three-, six-, and nine-MHz center frequency, 19-mm-diameter transducers were analyzed. The longer focal length transducer saturation level was comparable to a theoretical prediction. However, the theoretical saturation level for the shorter focal length transducers underestimated experimental results.

Original languageEnglish (US)
Pages (from-to)1287-1290
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Volume2
StatePublished - Dec 1 1999
Event1999 IEEE Ultrasonics Symposium - Caesars Tahoe, NV, USA
Duration: Oct 17 1999Oct 20 1999

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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