Which of the following statements is an accurate description of vibrations?

A. Neither ultrasonic nor infrasonic vibrations can be heard by humans.

B. The frequency of infrasonic vibrations is much too high to be heard by humans.

C. Ultrasonic vibrations have a frequency lower than the range for normal hearing.

D. Infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.

Question

Physics

Brennan Wall

3 February, 20:58

Which of the following statements is an accurate description of vibrations?

A. Neither ultrasonic nor infrasonic vibrations can be heard by humans.

B. The frequency of infrasonic vibrations is much too high to be heard by humans.

C. Ultrasonic vibrations have a frequency lower than the range for normal hearing.

D. Infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.

+3

Answers (1)

Know the Answer?

Scarlett Cordova · Answer 1

So we want to know what statement is an accurate description of vibrations. So humans can hear sound frequencies from 20-20000 Hz. Below 20 Hz is infra sound and above 20000 Hz is ultra sound. Humans cant hear both infra sound and ultra sound so the correct answer is A.