Acoustical Science and Technology
Online ISSN : 1347-5177
Print ISSN : 1346-3969
ISSN-L : 0369-4232
TECHNICAL REPORTS
Effect of measurement-based noise source model of military airplanes on the validity of aircraft noise estimation in Vietnam
Thanh Loc BuiThu Lan NguyenMakoto MorinagaTakashi MoriharaYasuhiro Hiraguri
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JOURNAL FREE ACCESS

2021 Volume 42 Issue 1 Pages 50-57

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Abstract

Noise map provides a basis for land-use and flight path planning to limit the noise impact on residents around airports. This study is one of the first attempts to access an appropriate method to create noise maps for airports in Vietnam. In this study, the Lden around Noi Bai International Airport (NBIA) was predicted by using the Integrated Noise Model (INM) with available Noise-Power-Distance (NPD) data in INM and NPD data of military airplane created based on the field measurement. Besides, to assess the validity of the prediction, the predicted Lden was compared with the measured Lden, which were defined by field measurements conducted at ten residential sites around NBIA in November 2017. The noise levels were estimated with 3 cases: (1) Civil aircraft only, using INM's NPD; (2) Civil aircraft & military aircraft, using INM's NPD for military aircraft; (3) Civil aircraft & military aircraft, using measurement-based NPD for military aircraft. By comparing the root mean square error between the predicted and the measured values, it could be found that the prediction in Case 3 is the most consistent with the measured Lden. In other words, the prediction validity was improved by using measurement-based NPD of military aircraft.

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© 2021 by The Acoustical Society of Japan
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