Laboratory studies show that the annoyance caused by shooting sounds can be predicted from the outdoor A- and C-weighted sound exposure levels (ASELs and CSELs; LAE and LCE). For any single event, the rating sound level, Lr,s in decibel, is given by Lr,s = LAE + 12 + β(LCE − LAE)(LAE − α). On the basis of the laboratory results α = 47 dB and β = 0.015 dB−1 were recommended. In the present study, parameter values α and β are re-estimated. Subjective reactions to shooting and road-traffic sounds were determined for 400 respondents divided among 15 residential areas. Also, the noise dose for road traffic was calculated and the ammunition spent in the 12 months preceding the administration of the questionnaire was listed. Next, for all impulsive sources, the required ASELs and CSELs received in the residential areas were calculated. Based on the data from the majority of the residential areas, the estimated β in combination with α = 45 dB is equal to 0.025 dB−1. At the lower and upper limits of the 95% confidence interval of β, as obtained with the help of a bootstrap method, β is equal to 0.013 and 0.037 dB−1, respectively.
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February 2017
February 16 2017
Estimating parameter values in a model for rating shooting sounds from field survey data
Joos Vos
a)
TNO Human Factors
, P.O. Box 23, 3769 ZG Soesterberg, The Netherlands
a)
Current address: Laan van Bergen 51, 3703 TH Zeist, The Netherlands. Electronic mail: [email protected]
J. Acoust. Soc. Am. 141, 864–877 (2017)
Article history
Received:
August 24 2016
Accepted:
January 30 2017
Citation
Joos Vos; Estimating parameter values in a model for rating shooting sounds from field survey data. J. Acoust. Soc. Am. 1 February 2017; 141 (2): 864–877. https://doi.org/10.1121/1.4976215
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