Lorient Pacific Ltd
Unit 509, 5th Floor
Block A
Ming Pao Ind Ctr
18 Ka Yip Street
Chai Wan
Hong Kong
Tel: +(852) 2505 0328
Fax: +(852) 2505 0332
sales@lorienthk.com
Registered Office: Fairfax Road, Heathfield, Newton Abbot
Registered In England No. 1441058

“Measurement of sound insulation in buildings and of building elements. Part 3 – Laboratory measurement of airborne sound insulation of building elements”.
Formerly known as BS 2750 Pt 3, BS EN ISO 140-3 is the combined British, European and International Standard method of test for determining the acoustic performance of a door assembly, and can be used to quantify the effectiveness of a sealing system on any given door construction. There is no pass or fail to this test - results can be interpreted by using guidelines set out in BS EN ISO 717-1.
This link to British Standards Online may be of interest.
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