Sound pressure=A cos(omega*t) how can i find rms of sound pressure?

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Julien Bustillo

Hi,

In the case of a sine waveform, the RMS value is just the amplitude divided by the square of 2.

In your case it's about 7 and 14.

Hope it helps

Kabilan Bas

thank you. but how can i calculate in case of cos?

i.e. A sin(omega*t +pi/2)

this also same as per you said (A/root square of 2) or vary? please suggest me.

it's the same.

The RMS value is calculated over a period and sin and cos have the same waveform over a period.