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RE: pink noise freq response with both L and R

Posted by Dave_K on June 20, 2016 at 11:41:44

In Reply to: pink noise freq response with both L and R posted by dave789 on June 19, 2016 at 10:20:06:

Dave,

Not sure if this is what you're referring to, but:

When playing a test signal through both channels simultaneously and measuring with a single microphone, it is common to see some cancellation effects at high frequencies. Because the wavelengths are so short (1.35 inches at 10KHz), it is easy for the signals from L & R speakers to arrive out of phase in the top octave. You can minimize the cancellation by measuring the distance from the microphone to each tweeter and moving the microphone such that the distances are equal to within 1/4 inch, and also make sure toe-in is the same. Or you can ignore it. It's an artifact of a single point microphone measurement and isn't representative of what you hear with two ears.

Regards,
Dave

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