In 1964, just a few years after the invention of the laser, a fluid velocity measurement based
on the frequency shift of scattered light was made and the laser Doppler technique was …

Sound-field imaging, the visualization of spatial and temporal distribution of acoustical
properties such as sound pressure, is useful for understanding acoustical phenomena. This …

Laser vibrometry based on coherent detection allows noncontact measurements of small-
amplitude vibration characteristics of objects. This technique, commonly using the Doppler …

Transcranial ultrasound therapy is an increasing area of research for noninvasive treatments
in the brain including targeted drug delivery. Measurements of ultrasound transmission …

Acoustic levitation provides potential to characterize and manipulate material such as solid
particles and fluid in a wall-less environment. While attempts to levitate small animals have …

Focused ultrasound (FUS) shows great promise for use in the area of transcranial therapy.
Currently dependent on MRI for monitoring, transcranial FUS would benefit from a real-time …

Localized changes in the density of water induced by the presence of an acoustic field
cause perturbations in the localized refractive index. This relationship has given rise to a …

A scanning laser Doppler vibrometer is used to record two-dimensional ultrasound fields in
air. The laser light of the vibrometer traverses the sound field to and from a rigid reflector and …

Laser vibrometry based on coherent detection allows non-contact measurements of small-
amplitude vibration characteristics of objects. This technique, commonly using the Doppler …

A technique for the calibration of hydrophones using an optical method is presented. In the
method, a measurement is made of the acoustic particle velocity in the field of a transducer …