{"product_id":"analysis-of-acoustic-modeling-and-nasa-technical-reports-server-ntrs-9781287239093","title":"Analysis of Acoustic Modeling and Sound Propagation in Aircraft Noise Prediction","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.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Nasa Technical Reports Server (Ntrs)\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1287239099\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781287239093\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Bibliogov\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 07\/23\/2013\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 78\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.34lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.69h x 7.44w x 0.16d","brand":"Nasa Technical Reports Server (Ntrs)","offers":[{"title":"Paperback","offer_id":47611321876735,"sku":"9781287239093","price":17.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_f2e9852c-c64d-4cdd-9237-1662011d844d.jpg?v=1764513146","url":"https:\/\/www.whiterainbookhouse.com\/products\/analysis-of-acoustic-modeling-and-nasa-technical-reports-server-ntrs-9781287239093","provider":"WR Book House","version":"1.0","type":"link"}