The aims of this study are to clarify the current situation of sound environment and feelings and image evoked by the sound at Tomoi area in Higashi-Osaka city, selected as a case study of built-up area rapidly developed in 1960s.
The sound in the built-up area is broadly classified into two categories; the one produced in exterior space and the other inside houses. We found 82 types of sound in exterior space and classified it into six categories; ‘activity’, ‘voice’, ‘nature(water・wind)’, ‘nature(creature)’, ‘traffic’ and ‘equipment’ whereas 36 types of the sound produced inside houses are classified into four categories; ‘activity’, ‘voice’, ‘nature (creature)’ and ‘equipment’.
The sound captured in exterior space varies with location. ‘Voice’ is mainly collected at around the facilities such as elementary schools and preschools. As most of ‘nature(water・wind)’ comes from wind, the number of objects such as garden trees and clothes at drying space has an impact on its production. As the ‘nature(creature)’ is mostly produced by birds, its production is affected by the number of trees to sit on. The number of ‘traffic’ tends to increase along wider roads. The sound source produced by ‘equipment’ is dominated by condenser units along streets. The sound produced in the exterior space is significantly affected by location and time as it contains not only the one captured nearby houses but also the one produced on the road and above.
Frequency and category of sound produced inside houses vary according to housing types. ‘Cooking’ was frequently captured at row houses and bunka-jutaku because of the kitchens located at the side of front roads. There was little sound captured at detached houses with large site whereas the ones with smaller site frequently brought ‘voice’ and ‘activity’. Small-scale detached house hardly brought the sound due to the location of living and private rooms located at or above the first floor. Sound is hardly captured at front roads of apartment house as it keeps a distance between the roads and dwelling units where parking, side corridors and shared entrances are located in between.
Feelings and image recalled from the sound are classified into eleven categories and it can be reclassified into three large categories; ‘feelings to the sound’, ‘feelings to the sound source’ and ‘evoking image by the sound’. Four categories; ease, surprise, fear and unpleasant are in ‘feelings to the sound’. Four categories; interest, wish, resign and admire are in ‘feelings to the sound source’. Three categories; daily life, retrospection and silent are in ‘evoking image by the sound’.
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