Abstract
Speech intelligibility is affected by various interfering factors in a speech transmission system. Noise is one of the most common affecting factors. Subjective listening experiments were, respectively, carried out in pink noise, speech noise, and white noise-interfering environment. The perceptual characteristics of the initials, finals, tones, and syllable intelligibility were analyzed, and the function relationships between Chinese speech intelligibility and SNR in noise environment were concluded, which could be used to evaluate or predict the Chinese speech intelligibility under noise transmission conditions.
Highlights
Speech is a main way of human communication, and speech intelligibility is an important parameter to assess the acoustic quality of a communication system
Speech could be interfered by various factors in the communication system, like noise, reverberation, distortion, and so on
Subjective experiments of speech intelligibility were performed in a listening room according to the National Standard of the People’s Republic of China AcousticsSpeech articulation testing method [23], which introduces the method of measuring and evaluating the quality of a speech transmission system quantificationally and directly
Summary
Speech is a main way of human communication, and speech intelligibility is an important parameter to assess the acoustic quality of a communication system. Subjective experiments of speech intelligibility were performed in a listening room according to the National Standard of the People’s Republic of China AcousticsSpeech articulation testing method [23], which introduces the method of measuring and evaluating the quality of a speech transmission system quantificationally and directly. Erefore, the SNR of speech intelligibility experiments in noise environment was chosen from −14 dB to 20 dB with 2 dB or 4 dB increasing and including the initials speech recorded in studio without extra noise added with SNR of 50 dB. In order to compare and analyze the results, the SNRs were identical in the three types of noise-interfering environments, and each SNR condition included two speech signals with one male speaker and one female speaker. If a subject writes down the initials completely same as what he heard, his record was regarded as a correct result; otherwise, considered wrong one, and the ratio of correct
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