Producing an intense collimated beam of sound via a nonlinear ultrasonic array
Abstract
We have designed and built an ultrasonic parametric array with an emphasis on creating an intense, collimated beam of low frequency sound. With this device, we can insonify a small area of ground or a small target at range and induce vibrations. These vibrations can be synchronously detected with any stand-off device such as a laser-Doppler vibrometer or the millimeter wave vibrometer we describe in Smith et al. [J. Appl. Physics 108, 024902 (2010)]. Despite nonlinear conversion losses, the array produces sound pressure levels in excess of 90 dB at 1 kHz, 1.5 m in front of the array using 25 low-cost 40 KHz transducers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 15, 2012
- Source ID
- 10.1063/1.4729265
Entities
People
- Brian Zadler
- Daniel Gibson
- John Scales
- Martin Smith
Organizations
- Applied Research Associates (United States)
- Colorado School of Mines
- Harvard Medical School
- Office of Naval Research