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Artificial mouth

Product Code: 44AA

The Type 44AA is for testing telephone mouthpieces as well as other microphones similarly used in communication networks.

The Mouth Simulator Type 44AA is a sound source which simulates the sound field around the human mouth at close quarters and complies with the Standards IEEE 269, 661 and ITU-T Rec. P51.

A sound source which simulates the sound field around the human mouth at close quarters and complies with the Standards IEEE 269, 661 and ITU-T Rec. P51.

The Type 44AA is for testing telephone mouthpieces as well as other microphones similarly used in vocal communication networks. At the mouth reference point (MRP), which is 25 mm from the detachable lip ring (35 mm from the 44AA’s mouth), the minimum-continuous equalised signal it can produce in ⅓-octave bands is 100 dB re. 20 μPa in the frequency range 100 Hz to 16 kHz. Its loudspeaker accepts an external signal either directly or via its own built-in power amplifier (when power is applied).

Jigs are included for calibration according to CCITT P.51 and Fpr IEEE 269. These are for use with 1/4" or 1/2" microphones. One jig holds the microphone at 0° incidence (1/4" only) to the sound source, the other at 90° incidence (1/2" or 1/4").

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