Intensity level of intensity `l` is 30 dB. The ratio `I/I_(0)` is (where `I_(0)` is the threshold of hearing)

Intensity level of a sound of intensity I is 30 db. Then the ratio I//I_(0) is (where I_(0) is threshold of hearing )

The intensity level of two sounds are 100 dB and 50 dB. What is the ratio of their intensities?

The intensity level of two sounds are 100 dB and 50 dB. What is the ratio of their intensities?

The intensity level of a sound of intensity of 10^(-12)wat t//cm^(2) is 40 dB. What is the zero level of intensity ?

The intensity of a light pulse travelling along a communication channel decreases exponetially with distance x according to the relation I=I_(0)e^(-ax) where I_(0) is the intensity at x=0 and alpha is the attenuation constant. The percentage decrease in intensity after a distance of (("In"4)/(alpha)) is