{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T11:31:01Z","timestamp":1789212661590,"version":"build-2803163510"},"reference-count":22,"publisher":"Acoustical Society of America (ASA)","issue":"5","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,5,1]]},"abstract":"<jats:p>Mountainous areas form a very specific context for sound propagation: There is a particular ground effect and meteorological conditions are often extreme. In this paper, detailed sound propagation calculations are compared to noise measurements accompanied by meteorological observations. The sound source considered is road traffic along the center axis of a valley. Noise levels were measured in two cross sections, at three locations each: one on the valley floor and two on the slopes, up to 166m above the source. For the numerical calculations, the rotated Green\u2019s function parabolic equation method is used, taking into account the undulation of the terrain and an inhomogeneous atmosphere. Typical parameters of this method were optimized for computational efficiency. Predictions agree with measurements to within 3dBA up to propagation distances of 1km, in windless conditions. The calculations further show that the terrain profile is responsible for an increase in sound pressure level at distant, elevated points up to 30dBA compared to a flat ground situation. Complex temperature profiles account for level changes between \u22123dBA and +10dBA relative to a homogeneous atmosphere. This study shows that accurate sound level prediction in a valley-slope configuration requires detailed numerical calculations.<\/jats:p>","DOI":"10.1121\/1.2717765","type":"journal-article","created":{"date-parts":[[2007,5,4]],"date-time":"2007-05-04T23:05:08Z","timestamp":1178319908000},"page":"2522-2533","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":30,"title":["Comparison of measurements and predictions of sound propagation in a valley-slope configuration in an inhomogeneous atmosphere"],"prefix":"10.1121","volume":"121","author":[{"given":"T. Van","family":"Renterghem","sequence":"first","affiliation":[{"name":"Ghent University , Department of Information Technology, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D.","family":"Botteldooren","sequence":"additional","affiliation":[{"name":"Ghent University , Department of Information Technology, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Lercher","sequence":"additional","affiliation":[{"name":"Medical University of Innsbruck , Section of Social Medicine, Innsbruck, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"231","reference":[{"key":"2023071223254789700_c1","article-title":"On the sound propagation in Alpine valleys","volume-title":"Proceedings of Euronoise 2006","year":"2006"},{"key":"2023071223254789700_c2","doi-asserted-by":"publisher","first-page":"270","DOI":"10.1175\/1520-0450(1982)021&lt;0270:BOTIID&gt;2.0.CO;2","article-title":"Breakup of temperature inversions in deep mountain valleys. 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