STUDY ON MEASURING METHOD BY PULSE SOUND SOURCE FOR END REFLECTION LOSS OF DUCT

Autor:	Hiroyoshi Shiokawa, Maya Satou
Rok vydání:	2011
Předmět:	Physics Optics Acoustic design business.industry Acoustics Architecture Reflection loss ASHRAE 90.1 Duct (flow) Building and Construction business
Zdroj:	AIJ Journal of Technology and Design. 17:555-558
ISSN:	1881-8188 1341-9463
DOI:	10.3130/aijt.17.555
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b7cdfe41fbf6ed26d14ba3184ce575b3 https://doi.org/10.3130/aijt.17.555 Zobrazit plný text záznamu