Our group develops, maintains, and provides measurement standards in the fields of acoustics, ultrasound, and vibration. Acoustic standards are essential for accurately measuring sound in air, especially for evaluating noise levels. We provide these standards by calibrating microphone sensitivity, which determines how sound pressure is converted into electrical signals. Ultrasound standards help measure sound waves in water, mainly for assessing the safety of medical ultrasound. These standards are delivered by calibrating ultrasonic power, which represents the output of sound sources, and the sensitivity calibration of hydrophones, which are underwater microphones. Vibration standards are used to measure movement caused by shaking or oscillation and are important for assessing environmentally regulated vibrations. We provide these standards by calibrating accelerometers, which convert vibration acceleration into voltage or electric charge.

1. Conducting research to establish acoustic standards based on optical sound pressure measurement techniques that do not rely on the characteristics of microphones, which are man-made devices.

2. Conducting research and development on precise measurements of ultrasonic field, supporting the performance and safety evaluation of ultrasonic equipment used in medical and industrial applications.

3. Using shock acceleration calibration techniques we developed to measure sudden and transient vibrations during safety and durability testing of mobile machinery.