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자료유형
학술저널
저자정보
저널정보
대한건축학회 대한건축학회 논문집 대한건축학회 논문집 제6권 제3호
발행연도
1990.6
수록면
163 - 168 (8page)

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In the field of architectural acoustics, various kinds of physical me asurements are carried out:such as measurements of room acoustic properties (reverberation time, echo-time- patterns, sound pressure level distribution, etc.) sound absorption and insulation characteristics of materials, sound insulation efficiencies of buildings, propagation and sound radiation solid-borne sound(vibration)in buildings and so on. As for the methods of such architectural acoustic measurements, different kinds of methods and techniques are being used in each measurement. However, by summarizing these physical measurements from the view point of signal processing, it can be said that almost all measurements are the measurement of sound or vibration propagation in linear acoustic systems. In these measurements, two ways of exciting methods are mainly used; one is the stationary random excitation and the other is the impulsive excitation. So, in this paper, these two methods used in various architectural acoustic measurements were compared, and the way of measuring and analyzing the impulse responses of acoustic systems were considered theoretically and experimentally. As the first theoretical study, the relationship between the method using stationary random noise sources and that using impulsive sources was investigated. As a result, it was clarified that the results obtained by square-integration the impulse response(in the case of sound pressure or vibration acceleration measurements) or by simply time-integrating the impulse response(in the case of sound intensity measurement) are exactly equivalent to the results measured by stationary random excitation. In order to confirm this theoretical relationship, various kinds of sound and vibration propagation mesurements such as the sound pressure level distribution in rooms, the vibration acceleration level distribution in a model building structure and sound pressure and sound intensity radiation from a excited steel structure were carried out by using both of exciting methods. From experiment, the validity of the theory has been confirmed.

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