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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク EPNdB ： ウィキペディア英語版 EPNdB EPNdB, or Effective Perceived Noise level in decibels, is a measure of the relative loudness of an aircraft pass-by event. It is defined in Annex 16〔https://www.caa.govt.nz/ICAO/Annex_16_Vol_I.pdf〕〔http://www.icao.int/Meetings/EnvironmentalWorkshops/Documents/NoiseCertificationWorkshop-2004/BIP_2_2_jb.pdf〕 of the ICAO International Convention on Civil Aviation, and in the US Federal Air Regulations Part 36.〔http://www.ecfr.gov/cgi-bin/text-idx?rgn=div5&node=14:1.0.1.3.19〕 The EPNdB rating of an aircraft is used to estimate how much contribution a given aircraft will make to the noise impact of an airport in a community, which is estimated using the day-night average sound level metric. Detailed information on measurement of aircraft acoustic signature to meet the requirements of Annex 16 is found in ICAO Document 9501〔http://www.icao.int/environmental-protection/Documents/Publications/Doc_9501_Volume_I.pdf〕 and IEC 61265.〔https://webstore.iec.ch/publication/5076〕 Data acquisition in one-third-octave bands is required, followed by processing to yield a logarithmically-scaled value in decibels relative to a sound pressure of 20 micropascals, approximately the threshold of hearing. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EPNdB」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.