My research activities have been concerned with acoustic studies of microscopic phenomena at the molecular scale and applications of this knowledge to outdoor sound propagation. The outdoor sound propagation program is concerned primarily with the effects of turbulence on the coherence of propagating, diffracting, and nonlinear waves.
Current experiments utilize acoustics to drive a thermoacoustic refrigerator.
My research activities are concerned with the theorectical and experimental aspects of outdoor sound propagation. Current efforts involve the development of analytical expressions for the refraction of acoustic waves in poroelastic media in order to develop a microscopic description of particle motions in the media. My research activities include development of instrumentation for research in acoustics. Measurements of sound propagation outdoors have included the effects of sound attenuation by vegetation, soil porosity, turbulence, and the acoustic generation of seismic waves. Instrumentation projects in acoustics include the development of subsonic speakers for outdoor sound propagation measurements and the construction of ultrasonic transducers for measurement of acoustic shock waves and for use in various robotics applications.