Post2T - The post processing software
Post2T: Time Based Output.
Selecting to display "Noise Spectrum Processing" from the main menu opens the following dialog box:
Two types of outputs can be selected:
The position and distance of the microphone relative to the tailpipe can be specified.
This graph shows the sound pressure level at each frequency as generated by the intake and exhaust system. This is for a 250 Grand Prix engine but only one cylinder was simulated. The interesting thing is the low frequency noise comes primarily from the intake (The black graph is much higher than the red one for the early part of the range).
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