The company I represent is looking to test our products for their noise reduction capabilities. We are looking to genarate 'white noise' on one side of a sealed chamber with a microphone on the other side, and our product in the middle, acting as a sound damper. What we need is a piece of software/hardware that can then measure the loudness (dB) of specific frequencys of this white noise (ie. 50Hz, 300Hz, 1kHz....up to 5 or 10 kHz), and allow us to make a graph of loudness against frequency. Do you have any hardware/software that would enable us to do this?