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direction is usually from the south, and average windspeed is 10-12 mph (Schaefer,

Figure 1 direction is usually from the south, and average windspeed is 10-12 mph (Schaefer,

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Table 1. Daily permissible exposure limits for the U.S. The exchange rate is the rate at which sound exposure level changes with a
Table 1. Daily permissible exposure limits for the U.S. The exchange rate is the rate at which sound exposure level changes with a
Table 2. Impulsive sound pressure levels allowed for repetitions during a day 2.3 Noise Guidelines
Table 2. Impulsive sound pressure levels allowed for repetitions during a day 2.3 Noise Guidelines
Source: Extracted from WHO 1999, Community Noise Guidelines, page 65. Table 3. Guideline values for community noise in specific environments. Table 4. Noise abatement criteria (NAC) specific environments in South Dakota
Source: Extracted from WHO 1999, Community Noise Guidelines, page 65. Table 3. Guideline values for community noise in specific environments. Table 4. Noise abatement criteria (NAC) specific environments in South Dakota
Figure 2. High-resolution orthoimage of South Dakota State Campus. technology and field methods used to collect sound data, classify it by source, and smartphone app (SPA) and a digital noise meter (DNM). This section also describes the
Figure 2. High-resolution orthoimage of South Dakota State Campus. technology and field methods used to collect sound data, classify it by source, and smartphone app (SPA) and a digital noise meter (DNM). This section also describes the
lots, and so forth. These features were digitized manually using ArcGIS software.
lots, and so forth. These features were digitized manually using ArcGIS software.
Figure 4. NIOSH interface
Figure 4. NIOSH interface
an accuracy of +/- 1.5dB, and a sampling rate of 2 times per second. It can operate under
an accuracy of +/- 1.5dB, and a sampling rate of 2 times per second. It can operate under
Table 6: Summary of variogram models for Kriging the noise data The interpolated noise values (dBA) were extracted as a raster from R software
Table 6: Summary of variogram models for Kriging the noise data The interpolated noise values (dBA) were extracted as a raster from R software
Table 7. Summary statistics for noise levels from DNM and SPA devices. According to the results in Table 7, the DNM recorded a mean value of 58.0 dBA
Table 7. Summary statistics for noise levels from DNM and SPA devices. According to the results in Table 7, the DNM recorded a mean value of 58.0 dBA
Figure 8. Volume, pitch, and perception for sound sources during the morning soundscape maps will only illustrate mechanical, natural, and human sources of sound.
Figure 8. Volume, pitch, and perception for sound sources during the morning soundscape maps will only illustrate mechanical, natural, and human sources of sound.
Figure 9. Volume,pitch, and perception level for sound sources during the afteroon. include birds, squirrels, and leaves rustling in the wind.
Figure 9. Volume,pitch, and perception level for sound sources during the afteroon. include birds, squirrels, and leaves rustling in the wind.
Figure 10. Pitch level for different sound sources during the evening presumably overwhelmed by air conditioners, fans, and traffic.
Figure 10. Pitch level for different sound sources during the evening presumably overwhelmed by air conditioners, fans, and traffic.
Table 8. Summary statistics for sound sources (five-point scale) by time interval. Mechanical sources seem to be the dominant sounds across the SDSU campus in
Table 8. Summary statistics for sound sources (five-point scale) by time interval. Mechanical sources seem to be the dominant sounds across the SDSU campus in
Figure 11. : Sources of noise in problem areas with their locations. noise are illustrated in Figure 11.
Figure 11. : Sources of noise in problem areas with their locations. noise are illustrated in Figure 11.
afternoon, and evening.
afternoon, and evening.
Figure 12. Comparison of noise level data collected from DNM and SPA devices.
Figure 12. Comparison of noise level data collected from DNM and SPA devices.
Table 9. Comparison of mean noise levels from DNM and SPA devices. of central tendency and dispersion for both noise level measuring devices. Only the
Table 9. Comparison of mean noise levels from DNM and SPA devices. of central tendency and dispersion for both noise level measuring devices. Only the
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