A perception based approach for acoustic events modeling in interactive sound field network

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Fukushima, M.
Yanagawa, H.
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This paper describes the relation between physical / acoustic parameters and psychological scale for the sound fields in order to create an artificial impulse response of the room based on the perception. First, 19 specific words were chosen that expressing subjective impressions of the sound field from a Japanese language dictionary with 42,000 vocabularies. To classify the 19 words, speech sounds are compared in the way of dichotic listening. The speech sounds are convolution of an anechoic speech and impulse responses of rooms measured by using a dummy head microphone. The words are clustered into 4 categories, 1) high tone timbre, 2) low tone timbre, 3) spaciousness and 4) naturalness or clearness. Then, the 'spatial impression' was selected among 19words and a scale of it was obtained by way of Thurstone's case V since it is one of the important factors in the sound field design. Second, to create an impulse response corresponding to the 'spatial impression', we investigate the relation between the 'spatial impression' and physical/acoustic parameters. As a result, we found that the initial part of impulse response is an important part for controlling 'spatial impression'. The result is confirmed by listening test using artificial impulse responses. Finally, we propose a psychological approach for AEML(Acoustic Modeling Language) for Interactive Sound Field Network.
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