The intensity of lawn mover is:
10-1 wm-2
10-2 wm-2
10-3 wm-2
10-4 wm-2
The sound level of rustling of leave is:
1 dB
20 dB
30 dB
10 dB
Intensity level of the sound produced by mosquito buzzing is:
70 dB
40 dB
120 dB
In computer terminology information means:
Any data
Raw data
Processed data
Large data
The pitch of a sound is most closely related to its:
Wave form
Period
Amplitude
Frequency
Safe level of noise depends on factors:
One
Two
Three
Four
1 bel=
0.1 dB
100 dB
0.01 dB
Sound waves having frequency lower than 20 Hz are called:
Ultrasonic
Infrasonic
Audible
Echo
