ANS:B - piezoelectric

Vibration up to 100 kilohertz can be most accurately measured by a piezoelectric type accelerometer. Piezoelectric accelerometers are well-suited for high-frequency vibration measurements because they can accurately detect rapid changes in acceleration over a wide frequency range, including frequencies up to several kilohertz or even higher. The piezoelectric effect allows these accelerometers to generate an electrical signal in response to mechanical deformation, making them highly sensitive to high-frequency vibrations. Preloaded spring and bonded strain gauge accelerometers are commonly used for lower frequency vibration measurements, but they may not be as accurate or sensitive for frequencies approaching or exceeding 100 kilohertz. Therefore, for accurate measurement of vibration up to 100 kilohertz, a piezoelectric type accelerometer would be the most suitable choice.