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This set of parameters can still be changed after the database has
been recorded. This can often be done in only one way, e.g. the
signal-to-noise ratio can only be decreased.
- Microphone characteristics. These are output
voltage/input pressure, bandwidth , linearity, impedance, directional
sensitivity. The microphone type (manufacturer, model number) and
speaking distance can be important parameters.
- Acoustic environment of the reader (reverberation ,
echo es, noise )
- Signal-to-noise ratio (dB)
- Signal level (voltage RMS or dB V)
- Transmission channel
characteristics. This includes bandwidth , clipping ,
bit-errors , etc.
EAGLES SWLG SoftEdition, May 1997. Get the book...