1. (1) ANSI/ASA S3.2-2009, AMERICAN NATIONAL STANDARD Method for Measuring the Intelligibility of Speech over Communication Systems (2009, reaffirmed 2014) (2014)
2. (2) N. R. French and J. C. Steinberg: “Factors governing the intelligibility of speech sounds”, J. Acoust. Soc. Am., Vol. 19, No. 1, pp. 90-119 (1947)
3. (3) J. B. Allen: “Harvey fletcher's role in the creation of communication acoustics”, J. Acoust. Soc. Am., Vol. 99, No. 4 Pt 1, pp. 1825-1839 (1996)
4. (4) ANSI s3.5-1997: methods for calculation of the speech intelligibility index (1997)
5. (5) C. H. Taal, R. C. Hendriks, R. Heusdens, and J. Jensen: “A short-time objective intelligibility measure for time-frequency weighted noisy speech”, in 2010 IEEE International Conference on Acoustics, Speech and Signal Processing, pp. 4214-4217 (2010)