Q1124
The frequency of ultrasound wave is typically
A.
Above 20 kHz
AnswerB.
Above 20,000 kHz
C.
Below 20 kHz
D.
Below 02 kHz
Answer: Option A
Solution
Answer: Option A
Solution:
Ultrasound refers to a sound wave with a frequency greater than the upper limit of human hearing, which is generally over 20 kHz. In general, humans can hear sounds with a frequency between 20 Hz and 20 kHz.