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 language | English (US) |
|---|---|
| Pages (from-to) | 1287-1290 |
| Number of pages | 4 |
| Journal | Proceedings of the IEEE Ultrasonics Symposium |
| Volume | 2 |
| State | Published - 1999 |
| Event | 1999 IEEE Ultrasonics Symposium - Caesars Tahoe, NV, USA Duration: Oct 17 1999 → Oct 20 1999 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics