Definition of Speech transmission index
Speech transmission index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro-acoustic equipment, telephone line, etc.), and expresses the ability of the channel to carry across the characteristics of a speech signal. STI is a well-established objective measurement predictor of how the characteristics of the transmission channel affect speech intelligibility.
The influence that a transmission channel has on speech intelligibility is dependent on:
frequency response of the channel
Terms mentioned above
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Frequently asked questions
What is Speech transmission index?
Speech transmission index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science.