ISBN 9798676368395 is currently unpriced. Please contact us for pricing.
Available options are listed below:
Available options are listed below:
Analysis of Acoustic Modeling and Sound Propagation in Aircraft Noise Prediction
| AUTHOR | Administration (Nasa), National Aeronaut |
| PUBLISHER | Independently Published (08/21/2020) |
| PRODUCT TYPE | Paperback (Paperback) |
Description
An analysis has been performed of measured and predicted aircraft noise levels around Denver International Airport. A detailed examination was made of 90 straight-out departures that yielded good measurements on multiple monitors. Predictions were made with INM 5, INM 6 and the simulation model NMSIM. Predictions were consistently lower than measurements, less so for the simulation model than for the integrated models. Lateral directivity ("installation effect") patterns were seen which are consistent with other recent measurements. Atmospheric absorption was determined to be a significant factor in the underprediction. Calculations of atmospheric attenuation were made over a full year of upper air data at seven locations across the United States. It was found that temperature/humidity effects could cause variations of up to +/-4 dB, depending on season, for the sites examined. It was concluded that local temperature and humidity should be accounted for in aircraft noise modeling. Plotkin, Kenneth J. and Shepherd, Kevin P. (Technical Monitor) Langley Research Center NASA/CR-2006-214503, WR 01-24 NAS1-00094; WU 781-20-11
Show More
Product Format
Product Details
ISBN-13:
9798676368395
Binding:
Paperback or Softback (Trade Paperback (Us))
Content Language:
English
More Product Details
Page Count:
74
Carton Quantity:
55
Product Dimensions:
8.50 x 0.15 x 11.02 inches
Weight:
0.43 pound(s)
Country of Origin:
US
Subject Information
BISAC Categories
Reference | Research
Reference | Space Science - General
Descriptions, Reviews, Etc.
publisher marketing
An analysis has been performed of measured and predicted aircraft noise levels around Denver International Airport. A detailed examination was made of 90 straight-out departures that yielded good measurements on multiple monitors. Predictions were made with INM 5, INM 6 and the simulation model NMSIM. Predictions were consistently lower than measurements, less so for the simulation model than for the integrated models. Lateral directivity ("installation effect") patterns were seen which are consistent with other recent measurements. Atmospheric absorption was determined to be a significant factor in the underprediction. Calculations of atmospheric attenuation were made over a full year of upper air data at seven locations across the United States. It was found that temperature/humidity effects could cause variations of up to +/-4 dB, depending on season, for the sites examined. It was concluded that local temperature and humidity should be accounted for in aircraft noise modeling. Plotkin, Kenneth J. and Shepherd, Kevin P. (Technical Monitor) Langley Research Center NASA/CR-2006-214503, WR 01-24 NAS1-00094; WU 781-20-11
Show More