Measuring Intensity of Sound

Hello all,

I am working on sound intensity probelm. I have recorded data using 2 microphones as pressure. I need to know how can I calculate sound intensity of that signal. I am stuck on this problem since a month and couldnt find anything that will solve it. Attached files has data recorded from 600Hz sine sound wave with some noise.

[KALYAN ACHARJYA]

Please see here

Answer 1

[Abhishek Kumar]

Hi Alok, as I understand you have recorded for 2 microphones in terms of pressure. The formula to convert pressure into intensity is

I = (P^2)/Z0;

I=Intensity,

P=Pressure,

Z0=Acoustic Impedance.

Thus you can use the following solution:

num = xlsread("DATA.xlsx");

P1 = num(:,2);

P2 = num(:,3);

Z = 400;

I1 = (P1.^2)/Z;

I2 = (P2.^2)/Z;