In subjective sound quality pair-wise comparison evaluation, test time grows with square of the number of sound stimulus. For this reason, subjective evaluation of large quantity of stimulus is difficult to carry out ...In subjective sound quality pair-wise comparison evaluation, test time grows with square of the number of sound stimulus. For this reason, subjective evaluation of large quantity of stimulus is difficult to carry out with pair-wise comparison method. A grouped pair-wise comparison （GPC） method is proposed to greatly decrease time and difficult of subjective comparison test, in which stimuli in the whole evaluation corpus are divided into N test groups, with reference-link stimuli configured in each group. Derived from subjective results of each group, final results of all stimuli are reconstructed, and their perceptual attributes of sound quality can be analyzed. With car interior noise as example, realization of subjective sound quality evaluation with GPC method is introduced. The results of GPC evaluation are in good agreement with those obtained from paired comparison and semantic differential methods.展开更多
With loudness-equalized car interior noise as sound stimuli, the work focused on apphcabihty of nonmetric multidimensional scaling （NMDS） to sound quality research. It is presented that NMDS is an effective tool for...With loudness-equalized car interior noise as sound stimuli, the work focused on apphcabihty of nonmetric multidimensional scaling （NMDS） to sound quality research. It is presented that NMDS is an effective tool for subjective assessment research of sound quality, when listeners are clustered through correlation between hsteners. With this key clustering process, the perceptual structure of car interior noise with strong consistency is revealed. The results shown that： for car interior noise, ‘preference＇ can be regarded as a main sub-dimension in ‘similarity＇ space and listeners could be divided into two groups; For both groups of listeners, the perceptual ‘preference＇ can be characterized as one-dimensional descriptor, with one group has a positive relation to ‘low-frequency＇, while another group has a negative relation to ‘low- frequency＇.展开更多
基金This work was supported by the National Natural Science Foundation of China (10374071).
文摘In subjective sound quality pair-wise comparison evaluation, test time grows with square of the number of sound stimulus. For this reason, subjective evaluation of large quantity of stimulus is difficult to carry out with pair-wise comparison method. A grouped pair-wise comparison （GPC） method is proposed to greatly decrease time and difficult of subjective comparison test, in which stimuli in the whole evaluation corpus are divided into N test groups, with reference-link stimuli configured in each group. Derived from subjective results of each group, final results of all stimuli are reconstructed, and their perceptual attributes of sound quality can be analyzed. With car interior noise as example, realization of subjective sound quality evaluation with GPC method is introduced. The results of GPC evaluation are in good agreement with those obtained from paired comparison and semantic differential methods.
基金This work was supported by the National Natural Science Foundation of China (10374099, 10374071).
文摘With loudness-equalized car interior noise as sound stimuli, the work focused on apphcabihty of nonmetric multidimensional scaling （NMDS） to sound quality research. It is presented that NMDS is an effective tool for subjective assessment research of sound quality, when listeners are clustered through correlation between hsteners. With this key clustering process, the perceptual structure of car interior noise with strong consistency is revealed. The results shown that： for car interior noise, ‘preference＇ can be regarded as a main sub-dimension in ‘similarity＇ space and listeners could be divided into two groups; For both groups of listeners, the perceptual ‘preference＇ can be characterized as one-dimensional descriptor, with one group has a positive relation to ‘low-frequency＇, while another group has a negative relation to ‘low- frequency＇.
