Radiation force calculation for oblique ultrasonic beams (L)

The acoustic radiation force exerted on a perfect absorber in a lossless fluid has recently been calculated for the case of a rectangular transducer emitting a static (i.e., frozen) ultrasonic field in the forward direction. The calculation is extended here, at least approximately, to the case of an oblique beam. This is important for measuring the ultrasonic power of scanning diagnostic devices. (C) 2009 Acoustical Society of America. [DOI: 10.1121/1.3097839]