Some distributional characteristics of amplitude levels of nasal accelerometric signals during connected speech
Yoshiyuki Horii · The Journal of the Acoustical Society of America · 1980
Amplitude distribution characteristics of nasal tissue vibration during oral reading were investigated using a miniature accelerometer placed on the external surface of the talker's nose. Six male and six female adults read the “Zoo” passage (Fletcher, 1978) which was devoid of nasal consonants, and the “Rainbow” passage (Fairbanks, 1960) which contained a number of nasal consonants, at a low, comfortable, and high vocal intensity level. Nasal accelerometer signals were rectified, smoothed, and quantized at a rate of 200 times per second. The distributions of the sampled nasal amplitude levels showed clear differences between the two passages, particularly for the male subjects. Effects of the vocal intensity levels and fundamental frequency levels upon the nasal amplitude levels, and two methods of normalizing the nasal accelerometric data regarding to the intensity differences were discussed. [Work supported in part by National Institute of Aging.]