| Summary: | 碩士 === 朝陽大學 === 建築及都市設計研究所碩士班 === 88 === ABSTRACT
The subjective evaluation of the spaciousness of an original sound source to the human ear is known as Apparent Source Width, ASW. This evaluation incurs the stereophonic of the spatial impression to the human, and is known as subjective diffusion. The relationship between ASW and the magnitude of the Interaural Cross-Correlation, IACC, is explained in physics as the width of the Interaural Cross-Correlation Function, WIACC.
In a natural sound field, as in the performance of opera or a classical orchestra, it is important for the audience to determine the direction of the sound source. It is the visual interactive in which audiences observably and immediately respond to a performance. In addition, in establishing suitable safety arrangements it is particularly helpful when visual aids can be used for determine the direction of an escape path correlating with the source of an announcement or warning siren.
The aim of this study is to explore the relationship of Source Directional Sensitivity, SDS, and Personal Binaural Spatial Impression, and whether it has the same interrelation with ASW.
As a focus to the SDS topic, the research methods will use two reflections in a simulated sound field, and include not only mathematical analysis but also an investigation of the psychological feelings of a human being. The Paired Comparison and Constancy Graphical approaches for statistical analysis will be used for the psychological experiment. It is intend to quantify the results via a control on the various variables. The results of this experiment it is hoped will reveal that the change of SDS is mainly limited by IACC according to the amount of the frequency of the whole reflection, and in which IACC is related to the direction and the frequency of the arrived reflection. Thereby giving evidence of the proportional relationship between SDS and IACC.
Keywords：apparent source width (ASW)、interaural cross-correlation (IACC)、 source directional sensitivity (SDS)
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