Systematic & Common Errors in Sound System STI and Intelligibility Measurements

Mapp P. Systematic & Common Errors in Sound System STI and Intelligibility Measurements. In: AES Convention 117. Audio Engineering Society; 2004. Paper 6271. Available from: https://aes.org/publications/elibrary-page/?id=12928

@inproceedings{Mapp2004_12928,
  author = {Mapp, Peter},
  title = {{Systematic \& Common Errors in Sound System STI and Intelligibility Measurements}},
  booktitle = {AES Convention 117},
  note = {Paper 6271},
  year = {2004},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12928}
}

TY  - CPAPER
TI  - Systematic & Common Errors in Sound System STI and Intelligibility Measurements
AU  - Mapp, Peter
T2  - AES Convention 117
M1  - Paper 6271
PY  - 2004
DA  - 2004/10/06
UR  - https://aes.org/publications/elibrary-page/?id=12928
PB  - Audio Engineering Society
LA  - en
AB  - STI or its derivatives (RaSTI and STIPa) have become the internationally accepted methods for acoustically measuring the potential intelligibility performance of a sound system. However, in practice, many of the measurements carried out in the field, to either verify or ascertain sound system and Voice Alarm intelligibility performance, are often based on flawed techniques. The paper examines a number of common problems found to affect measurement accuracy. The paper also highlights conditions under which STI and STIPa inherently appear to incorrectly predict intelligibility performance. In particular it is shown that the currently available commercial software programmes and instrumentation fail to correctly predict the performance of sound systems exhibiting irregular or band limited frequency responses when they are operating in reverberant environments under quiet (i.e. high signal to noise ratio) conditions.
ER  -