The Journal of the INCE of Japan
Online ISSN : 1883-7506
Print ISSN : 0386-8761
Dissertation—Contribution
Uncertainty of the Subjective Identification of Sound Sources in Measuring Sonic Environment
Tsubasa NishioTomoya TakashimaToshihito MatsuiKozo Hiramatsu
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2012 Volume 36 Issue 2 Pages 179-186

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Abstract

Necessity of sound source identification is widely recognized in noise measurement, such as the Noise Evaluation Manual issued by the Ministry of the Environment where sounds not targeted for the measurement are to be omitted from the calculation of noise indices. Although it cannot be free from uncertainty, since sound source identification is conducted by means of subjective judgment, it has not been closely examined. In this study, 30 subjects participated in the experiment where the sound sources of 9 sonic environments recorded in Arashiyama, Kyoto were presented through headphones and made judgments on the sound sources. The standard uncertainty of the identification was less than 2 percent when the target sound is higher by 10 dB than the background sound level (LA95) in the sonic environment.

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© 2012 The Institutew of Noise Control Engineering of Japan
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