Analysis of Spectrum and Spectrogram in Different Background of Hearing / 听力学及言语疾病杂志

ABSTRACT

Objective To find out the changes of voice in different noisy background by computer acoustic analysis.Methods 25 young people with normal hearing and normal vocal cords were selected.Sustained /a/ and /i/ were recorded in three different background:quiet, white band noise and speech noise. The software of Multi Speech and Doctor Speech were used. Testing parameters included Fo, mean amplitudes, standard deviations of amplitudes,F 1, F 2.Results Fundamental frequencies of noisy groups were significantly higher in male-/a/, female-/a/ and female-/i/.F 1 of noisy groups were significantly higher in male-/a/, male-/i/ and female-/i/.Conclusion Fo and F 1 of normal people can be changed by noise of backgroud.