(a) The power of sound from the speaker of a radio is 20 mW. By turning the knob of volume control the power of sound is increased to 400 mW, What is the power increase in dB as compared to original power? (b) How much more intense is an 80 dB sound than a 20 dB whisper?

How many times intense is 80 dB sound than a 20 dB sound?

How many times more intense is a 90 dB sound than a 40 dB sound?

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

The power of sound from the speaker of radio is 10 W. Now, the power of sound from the speaker of the radio is increased to 400 W by increasing the volume of the radio. The power increased in dB as compared to original power is nearly

How much intense is 80 dB sound in comparision to 40 dB?

The power output of a double speaker at a frequency of 60 Hz is 50 W.At a frequency of 90 Hz, the intensity of sound is 20 dB higher.What is the power output at 90 Hz ?

If the sound level in a room is increased from 50 dB to 60 dB, by what factor is the pressure amplitude increased ?

Two loudspeakers radiate in phase at 170 H_(Z) . An observer sits at 8 m from one speaker and 11 m from the other . The intensity level from either speaker acting alone is 60 dB . The speed of sound is 340 m//s . (a) Find the observer intensity when both speakers are on together. (b) Find the observer intensity level when both speakers are no together but one has its leads reversed so that the speakers are 180^(@) out of phase. (c ) Find the observer intensity level when both speakers are on and in phase but the frequency is 85 H_(Z) .