Re: vision:audition::surfaces:sources (Yoshitaka Nakajima )

Subject: Re: vision:audition::surfaces:sources
From:    Yoshitaka Nakajima  <nakajima(at)KYUSHU-ID.AC.JP>
Date:    Thu, 13 Jul 2000 22:18:08 +0900

Dear Professor Kubovy, Ryunen Teranishi, my former boss, compared audition and vision systematically, and wrote a few chapters of textbooks around 1980. The chapters are in Japanese unfortunately, but he pointed some differences between these two modalities very clearly. I summarize his argument below. 1. The information source is usually the sound source itself in audition, whereas the information in vision is usually given by the reflection of light from the surface of the information source. 2. The wavelengths of sounds are comparable to the sizes of our body and surrounding objects, and this makes it very difficult for us to have an auditory organ which can receive clear information about spatial patterns. 3. Things to reflect light exist in space for a long time, and the visual system is often used to perceive these "objects." 4. Perceived sounds are mostly related to temporal changes, and the auditory system is devoted to "events" in time. Auditory information should be processed in real time. Yoshitaka Nakajima Kyushu Institute of Design nakajima(at) Reference Teranishi, R. (1984). Temporal aspects in hearing perception. In: Namba, S. (Ed.). Handbook of Hearing. Kyoto: Nakanishiya Shuppan (in Japanese).

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