Importance

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Abstract

A sound source can be identified and measured for a long time period outdoors and indoors. A sound source identifying and measuring apparatus including a baffle provided with a frame and a weather-resistant screen for providing an aerial clearance is used for long-term indoor and outdoor measurement at a sound source measurement location to acquire sound source information in all the directions and associate the azimuth, elevation, sound pressure information and/or frequency characteristics or the like per elapsed time. A directional digital filter as well as identification parameters of a target sound source and untargeted sound source are used to identify the sound source more accurately for identification and measurement of the target sound source. Contribution of all of a plurality of sound sources to a sound pressure level is separated in terms of the coming direction for analysis. Thus, whether or not the sound source is a target sound is determined, and determination such as estimation of its sound source intensity and sound pressure level is made.

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First Claim