汉语声母声学距离与感知距离关系的研究-计算机科学与技术专业论文.docxVIP

ABSTRACT Since the acoustic space and perceptual space are not equivalent to each other, it’s very important to investigate the relationship between the acoustic space and perceptual space of Chinese, Tibetan, and Uighur. It was found out that the perception of Chinese initials is more difficult than that of Chinese finals. Many works have been done in the methods of the perception measurements for speech sounds. However, most of them are subjective measurement alone for perception aspects. In this paper, the monotonic relation between acoustic features and perceptual measurement is built and a new method for the objective perceptual measurement is given. Firstly, different types of acoustic features including frequency-domain and time-domain features are investigated. A couple of experiments with respect to acoustic space and perceptual space are conducted. In order to single out which distance metrics are suitable for measuring the acoustic distance and which acoustic features or their combinations are most consistent with the chosen distance metrics, a series of clustering analyses are conducted by using Mel Frequency Cepstral Coefficient and Perceptual Linear Prediction. Based on the chosen acoustic features and distance metrics, the acoustic distance between different types of initials is defined. Then, the perceptual distance is defined and a speech audiometry is conducted to obtain the confusion matrix, which can be transformed into the perceptual matrix by using the definition of the perceptual distance. Finally, the chosen acoustic features and distance metrics are validated by using a nonparametric method called Spearmans Rank Correlation Coefficient. The most consistent time-domain features are singled out by using the same procedures. Based on the chosen frequency-domain and time-domain features, a new formula is proposed to measure the acoustic distance objectively, which has a monotonic relation with the perceptual distance of different types of Chines