GRAS 44AB Mouth Simulator according to ITU-T Rec. P51

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GRAS 44AB Mouth Simulator according to ITU-T Rec. P51

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GRAS 44AB Mouth Simulator according to ITU-T Rec. P51

G.R.A.S.
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At the mouth reference point (MRP), which is 25mm from the detachable lip ring (35mm from the mouth of the Type 44AB), the maximum continuous signal it can produce in 1/3-octave bands is 100dB re. 20µPa in the frequency range 100Hz to 16kHz. Its loudspeaker accepts an external signal directly via a BNC input.

Jigs are included for calibration according to CCITT P.51 and IEEE 269. These are for use with ¼" or ½" microphones. One jig holds the microphone at 0º incidence (¼" only) to the sound source, the other at 90º incidence (¼" or ½").
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