A radiation force balance is used to determine the output power of a transducer system. We can measure the output power generated by transducers and reference sources, such as those produced by NIST and Precision Acoustics, to standard IEC 61161 & 62555:
High Intensity Therapeutic Ultrasound (HITU), used clinically for treating a wide range of conditions, is a rapidly growing field, and measurement methods are now in place at NPL for customers providing HITU-level power measurement capability on highly focused transducers. The technique has been tested successfully at power levels in excess of 300 W.
Power measurement devices can be calibrated for power levels up to:
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