Introduction This International Standard provides a stepwise approach to the determination of occupational noise exposure from noise level measurements. The

1. Phạm vi áp dụng Tiêu chuẩn này quy định phương pháp kỹ thuật đo đối với sự tiếp xúc

Significance and Use 5.1 The insertion loss of a pipe lagging system depends upon the lagging system materials, the method

Introduction This International Standard specifies the substitution method for determining the insertion loss of ducted silencers and a method for

Significance and Use 5.1 Specimens tested using this standard, for example, duct silencers, are used to control sound propagation through

Significance and Use 5.1 Specimens tested using this standard, for example, duct silencers, are used to control sound propagation through

This document specifies a laboratory substitution method to determine the insertion loss without flow of ducted, mainly absorbent, circular and