title: Torque feedback radiometer for ultrasonic power measurements.
abstract: A radiometer for use in ultrasonic power measurements in the 10-200 milliwatt regime has been built and tested. The device is based on the torque feedback principle applied to a friction-free taut-band meter movement. Measurements using the instrument have been made on two commercial ultrasound instruments.
mesh_terms: D011874:Radiometry / Q000295:instrumentation*; D014159:Transducers; D014465:Ultrasonics