Microscale Thermal Relaxation during Acoustic Propagation in Aerogel and Other Porous Media

@inproceedings{Conroy2000MicroscaleTR,
  title={Microscale Thermal Relaxation during Acoustic Propagation in Aerogel and Other Porous Media},
  author={John F. T. Conroy and ard Hosticka and Scott C. Da and Andrew N. Smith and Pamela M. Norris},
  year={2000}
}
The longitudinal acoustic velocity in silica aerogel is presented as a function of the interstitial gas type and pressure. This was measured using air-coupled ultrasonic transducers configured for differential pulse transit time measurements. The results are interpreted in terms of the thermal relaxation of the acoustic pulse. The microscale temperature… CONTINUE READING