What do we call when the sound of frequency will be below 20 Hz?

Related Mcqs:

1. Sound of frequency below 20 Hz is:___________?

   A. Audiosonic B. Infrasonic C. Ultrasonic D. Supersonic Submitted by: Fahad Mehsud...

2. The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?

   A. 1120 ft B. 120 ft C. 56 ft D. 100 ft E. None of these...

3. Name the branch of science which deals with the study of sound and sound waves?

   A. Aeronautics B. Acoustics C. Aerostatics D. Aetiology Submitted by: ABDUL HAYEE...

4. The speed of sound in air at sea level is approximately____________?

   A. 300 meter per second B. 320 meter per second C. 340 meters per second D. 370 meter per second Submitted by: ABDUL AZIZ KHAN...

5. Sound cannot travel through __________

   A. Solid B. Liquid C. Gases D. Vaccum Submitted by: M Khobaib Tariq...

6. A loudspeaker changes _________ energy into sound energy.

   A. Chemical B. Electrical C. Light D. Kinetic Submitted by: Danish Balani...

7. Sound travels_______ in solid materials then liquid?

   A. Constant B. Slowest C. Fastest D. None of these Submitted by: Ghulam Murtaza...

8. speed of sound in dry air at 20 °C is___________?

   A. 353 m/s B. 345 m/s C. 343 m/s D. none of them Submitted by: ARIF HUSSAIN...

9. When sound waves travel from air to water which of the following quantities remains unchanged?

   A. Speed B. Frequency C. Intensity D. Wavelength Submitted by: Rashid Mehmood...

10. Speed of sound in air is _______km/h?

    A. 1347 B. 243 C. 1235 D. 1495 Submitted by: Warraich...