Int. J. Metrol. Qual. Eng.
Volume 2, Number 2, 2011
|Page(s)||75 - 81|
|Published online||10 January 2012|
Indoor noise measurements evaluations for HVAC-Unit using inter-laboratory comparisons
Associate Professor of the Acoustic Laboratories in Building
Physics Research Institute at Housing and Building National Research Center,
HBRC, P.O. Box
2 Associate Professor, HVAC Consultant in Electro-Mechanical Research Institute at Housing and Building National Research Center, HBRC, P.O. Box 1770, Cairo, Egypt
Accepted: 24 November 2011
The international standard, ISO/IEC 17025 was developed to determine technical competence and to evaluate laboratories throughout the world. Accreditation bodies playing a vital role are increasingly using proficiency testing methodology as a tool to ensure the credibility of their accreditation programs. The successful completion of a well-designed proficiency test can validate the measurement method and uncertainty budgets of a testing laboratory. Additionally, proficiency tests can provide a good indication about the quality of the test results. An important part of inter-laboratory comparisons and proficiency testing is the determination of the associated error analyses which are focused on uncertainty values. This paper presents the implementation of proficiency tests using inter-laboratory methodology among five different acoustic laboratories. These tests were carried out on 5.27 KWCooling standard unitary air conditioner, A/C, such as through-wall or split room standard A/C units, for the assessment of Housing & Building National Centre acoustic laboratory. Analyses of results show a good agreement for En-Value among the selected laboratories when compared with the lowest uncertainty as stated by proficiency tests standards.
Key words: Indoor sound measurements / noise level in dBA / air-conditioning unitary unit / proficiency testing / Uncertainty / ISO/IEC 17025 / ASTM 1574
© EDP Sciences 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.