日本建築学会技術報告集
Online ISSN : 1881-8188
Print ISSN : 1341-9463
ISSN-L : 1341-9463
環境工学
パルス音源を用いたダクト開口端反射減衰の測定方法に関する研究
佐藤 真耶塩川 博義
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ジャーナル フリー

2011 年 17 巻 36 号 p. 555-558

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In general, end reflection loss value of duct for ASHRAE is used as the acoustic design data of the air-conditioning system.
However, the theoretical calculation is not described in ASHRAE Handbook and also an experimental examination is not done.
In this paper, the measuring method by pulse sound source for end reflection loss of duct is described and the end reflection loss values of the duct that of diameter is 200 mm are measured and calculated. These are compared with the values of ASHRAE and the differences of two on the frequencies from 50 Hz to 1500 Hz are small.

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© 2011 日本建築学会
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