Music Graduate Program - Master Degree
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ÖgeAuditory Distance Perception: Intensity And Direct-to-reverberant Energy Ratio Cues(Institute of Social Sciences, 2017) Çankaya, Bartu ; Karadoğan, Can ; Music ; MüzikSpatial hearing can be studied in several aspects such as directionality, localization, elevation and distance. This study investigated the auditory distance perception in particular significance. The term auditory distance perception is generally used to describe the listeners distance estimation. The distance estimation might not be the same with the actual sound source distance in the auditory space. There are several sound source attributes which are considered as distance cues for a given distance discrimination task. Main focus of the study was particularly the most effective relative and absolute distance cues. These are considered to be the intensity and the direct-toreverberant energy ratio cues. Both of the cues were examined in separate experiments by isolating each cue in a given experiment. Other than the isolation of the cues the condition of having multiple cues were also examined in relative and absolute distance perception. However, the distance perception of the sound sources in the median plane without elevation was the consideration of the study here. In the first section of the study a literature review had been done prior to the present study. Understanding the fundamentals of acoustics and the human hearing system is crucial for the distance perception phenomenon. This provided several benefits such as the design considerations of the experimental procedure. The next chapter basically constructed of the methodology used in this study including experimental design and procedure. This study is consisted of six auditory experiments conducted with 12 participants. The stimuli used for the experiments was an impulse sound with varying distances between 1 metre and 6 metres. A total of 18 stimuli were used in the experiments and participants were made to judge either the distance change or the absolute distance of the sound source in scientific units. The results provided that the intensity of the sound source is a robust relative distance cue while the DRR is exclusively effective for absolute distance perception.