IPHO 2014

Classical Mechanics Level 2

If threshold of hearing is assumed to be of reference (0db). Then the threshold of pain is taken to be 120dB. Let the corresponding intensity be A and B respectively then A/B Is...

10^12 10^0.12 10^-12 10^1.2

Shubham Gupta by shubham gupta , 23, India

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1 solution

Shubham Gupta
Jun 8, 2015

Use the dB scale definition that we likely to read but forget soon it is in resnik, Verna etc books 120=10log(B/A). Which gives A/B to be 10^-12

0 Helpful 0 Interesting 0 Brilliant 0 Confused

There wasn't anything to be done actually....Even if you don't know β = 10 l o g ( I / I ( o ) ) \beta =10log(I/I(o)) .One can guess it as loud sound must have more intensity so the asked ratio must be less than 1 1

Spandan Senapati - 4 years ago

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