Waves Test - 95...

The intensity of sound from a radio at a distance of 2 metre from its speaker is 1 x 10^–2 µ W/m². The intensity at a distance of 10 meters would be

The intensity of sound wave while passing through an elastic medium falls down by 10% as it covers one metre distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 metre thickness of the medium will be

How many times more intense is a 60 dB sound than a 30 dB sound?

The time of reverberation of a room A is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room A?

A sound absorber attenuates the sound level by 20 dB.The intensity decreases by a factor of

If separation between screen and source is increased by 2% what would be the effect on the intensity ?

The musical interval between two tones of frequencies 320 Hz and 240 Hz is

In an orchestra, the musical sounds of different instruments are distinguished from one another by which of the following characteristics?

Two waves having sinusoidal waveforms have different wavelengths and different amplitude. They will be having

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