[ProAudio] Calibrated playback level

David Josephson dlj at josephson.com
Tue Sep 28 21:29:29 PDT 2021

Yes to all of that. The mics are in fact measurement omni mic capsules (Gefell MK221 on our C617 bodies) that are rated for use with standard pistonphones or active calibrators like the B&K 4231.


> On Sep 28, 2021, at 7:00 PM, Chris Caudle via ProAudio <proaudio at bach.pgm.com> wrote:
> On Tue, September 28, 2021 2:35 pm, David Josephson via ProAudio wrote:
>> Each ambient includes a 94 dB SPL 1 kHz tone, which gets
>> replaced with 500-2000 Hz filtered pink noise of the same rms level.
>> That's scaled to play back in the listening space at 94 dB, all speakers
>> operating.
> Does that mean you have a calibrated acoustic source which generates a
> 94dB 1kHz acoustic tone, so that the level makes it all the way through
> the recording chain?
> Are you using omni mics, and that is something like the piston calibrators
> used to calibrate measurement mics?
> -- 
> Chris Caudle
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