A comparison of three conversational tests for the evaluation of voice communication equipment
Astrid Schmidt-Nielsen, Stephanie S. Everett · The Journal of the Acoustical Society of America · 1981
Intelligibility tests (e.g., Rhyme Tests or PB words) and quality tests (e.g., various rating scales) are often used to evaluate and compare voice communication systems. Whether tape recordings or live talkers are used, such tests are unidirectional and do not involve active two-way communications. Particularly in cases where the speech is likely to be degraded, as in low data rate digital voice communications, it is important to assess the actual usability of the system in a two-way situation where the talker can try to adapt his speaking habits to the special requirements of the system. Tests were conducted over a clear channel and nine digital voice processors with data rates from 800 to 32 000 bits/s. Three different conversational tests were used and their ability to differentiate among the processors was compared. [Work supported by ONR.]