[Acoustic analysis in different background of hearing].
OBJECTIVE
To find out the changes of voice in different noisy background by computer acoustic analysis.


METHODS
Twenty-five young people who got normal hearing level and normal vocal cords were selected. They were tested after trained. Sustained /a/,/i/ and sentences were recorded in the three different background: quite, white band noise and speech noise. The software of MDVP was used. Testing parameters included: F0, Jitter, Shimmer, APQ, PPQ, HNR.


RESULTS
Fundamental frequencies of noisy groups are significantly higher in male-/a/, female-/a/ and female-/i/ groups. The perturbations are not significantly different among them. The HNR is negatively relative with F0.


CONCLUSIONS
Normal hearing persons increase their fundamental frequencies in the noisy surroundings.
Department of Otolaryngology, Beijing Friendship Hospital, Capital University of Medical Sciences, Beijing 100050.
Yun
Y
Liu
Daoxing
D
Zhang
Yongxiang
Y
Liu
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects*; D013068:Speech Production Measurement; D014831:Voice / Q000502:physiology*