Thanks for the reply Greg. I think I found the solution. The SPL values can be combined using the following equation;
Combined dB = 10log(10^(dB1/10) + 10^(dB2/10) + ....... + 10^(dBn/10))
Thanks for your replys. Thanks Greg for the links.
I'm measuring the noise generated form a model helicopter on a CFD software. After reading their results again, I realised that they averaged the frequency over a number of revolutions of the rotor blades to eliminate any random portions of the...
Hi everyone,
I'm have an array of microphones (13 x 17) measuring pressure over a certain time period. I want to create a sound pressure level contour (SPL) plot from the pressure time histories for frequencies in the range (416 - 2,780 Hz). If I apply a fourier transform of the pressure time...
