KN.U-K2 International Laboratory Comparison of Ultrasound Power Measurements Emitted from an Ultrasonic Transducer

Abstract

An international comparison of ultrasound power measurements was conducted among the ultrasound laboratories of the Korea Research Institute of Standards and Science (KRISS), the National Metrology Institute of Japan (NMIJ) and the National Institute of Standards (NIS, Egypt). The measurand for comparison is the electro-acoustic radiation conductance G, which is defined as the amount of ultrasound power divided by the square of the input signal voltage to the transducer. The reference device is an ultrasonic transducer, model number KRISS-2MHz-14LN, manufactured by KRISS using a Lithium-Niobate (LiNbO₃) piezoelectric single crystal. This comparison, reference number KN.U-K2, was piloted by KRISS, including the preparation of the protocol and the reference device, and the analysis of measurement results by the participants. This paper reports the comparison results.