Ultrasound refers to sound whose
A) frequency is too high for most people to hear.
B) wavelength is too long for most people to hear.
C) intensity level is 100 dB or more.
D) frequency has undergone a Doppler shift to a higher one.

Question

Quizplus · Accepted Answer

Ultrasound refers to sound with a frequency above the upper limit of human hearing, which is typically around 20 kHz. Therefore, ultrasound has a frequency that is too high for most people to hear.

Ultrasound Refers to Sound Whose