Comparison of Hyponasality, Hypernasality, and Normal Voice Quality on the Intelligibility of Two-Digit Numbers
Henry M. Moser, John J. Dreher, Sol Adler · The Journal of the Acoustical Society of America · 1955
Six Eastern and General American speakers, using hyponasal, hypernasal, and normal voice qualities recorded random lists of two-digit numbers for presentation in noise to 11 trained listeners, all of whom had 32 hours practice in listening and testing in noise. Results indicate that, while voice qualities acted in a relatively similar manner at both signal-to-noise ratios tested, hypernasality was destructive to intelligibility under both conditions, hyponasality was destructive at the milder noise level, and normal delivery was best throughout.