Film-Tech Forum ARCHIVE: Pink noise input

This is topic Pink noise input in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Fred Tucker (Member # 4482) on 11-23-2008, 07:14 PM:

I've been looking at a Phonic PAA-3 for quick audio checks & I noticed it has a built-in pink noise generator. Trouble is the output is only -10dB. Is it possible to use this in a application that normally requires 0dB? Could I compare the SPL level between a 0db input and a -10dB input and use a relative measurement for quick checks?

Posted by Sam D. Chavez (Member # 1841) on 11-23-2008, 08:58 PM:

I would be careful using pink noise at 0dB with speakers on the other end. The pseudo random nature of pink noise you could easily hit 100% modulation plus some on some peaks.

Posted by Monte L Fullmer (Member # 2797) on 11-23-2008, 09:56 PM:

True. Don't we usually use -20dB input levels with external pink noise devices?

Posted by Fred Tucker (Member # 4482) on 11-24-2008, 12:33 AM:

My theatre has Ultra Stereo JS-200's which according to the manual you need to input 0dB when you do a b-chain. I normally borrow my tech's "pink" noise card, but would like to stop doing that.