The source of sound is:
- AA vibrating object
- BA stationary object
- CA silent object
- DA transparent object
Sound is a:
- ATransverse wave
- BLongitudinal wave
- CElectromagnetic wave
- DLight wave
For sound to propagate, a __ is required.
- AVacuum
- BMedium
- CMirror
- DLens
The audible range for humans is:
- A0–20 Hz
- B20–20,000 Hz
- C20,000–40,000 Hz
- D0–20,000 Hz
Sound waves with frequencies below 20 Hz are called:
- AUltrasonic
- BInfrasonic
- CAudible
- DSupersonic
The characteristic of sound that distinguishes between grave and shrill sounds is:
- ALoudness
- BPitch
- CQuality
- DAmplitude
The loudness of sound depends upon:
- AFrequency
- BAmplitude
- CWavelength
- DSpeed
The unit of loudness level is:
- AHertz
- BDecibel
- CMeter
- DSecond
The speed of sound in air is approximately:
- A150 m/s
- B340 m/s
- C1500 m/s
- D5000 m/s
The sensation of sound persists in our brain for about:
