NTi Audio TalkBox - Manual (Page 6)

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General
NTi Audio TalkBox features human head-like dimensions. A build-in combination
of solid state generator and DSP ensures highest playback accuracy and lowest
sample frequency deviations with minimized jitter effects. The internal precision
loudspeaker is individually calibrated to achieve a very flat frequency response in
the typical frequency range of the human voice. Each TalkBox is individually equal-
ized and calibrated and has an excellent frequency response accuracy of +/- 1 dB
over the relevant frequency range. The radiation characteristic complies with the
ITU-T P.51 in wide ranges.
The perfect frequency response and the precisely correct playback sampling rate
are specifically important to minimize systematic errors when performing STIPA
measurements.
Speaker
The IEC60268-16 standard specifies a sound pressure level for a speaker simulator
of 60 dBA in 1 meter distance. The NTi Audio TalkBox levels are calibrated to comply
with this standard. To avoid operating failures the TalkBox has no volume control.
Mic Stand Mount
The exact positioning the NTi Audio TalkBox in front of a microphone (at the place
where a real human speaker would be) is easy using a conventional mic stand. A
universal mic stand mount is available at the bottom of the box.