ISO 354:2003 specifies a method of measuring the sound absorption coefficient of acoustical materials used as wall or ceiling treatments,

5.1 Measurement of the sound absorption of a room is part of the procedure for other acoustical measurements, such as

This test method covers the use of an impedance tube, two microphone locations and a digital frequency analysis system for

1. Scope 1.1 This part of ISO 10534 specifies a method for the determination of the sound absorption coefficient, reflection

Introduction This document specifies the engineering method for the measurement of sound pressure level from service equipment in buildings. For

Tiêu chuẩn này quy định các phương pháp đo mức áp suất âm của các thiết bị sử dụng trong

5.1 The main part of this standard uses procedures originally developed for laboratory measurements of the transmission loss of partitions.

5.1 The main part of this standard uses procedures originally developed for laboratory measurements of the sound transmission loss of partitions.

Significance and Use 5.1 Sound transmission loss as defined in Terminology C634, refers to the response of specimens exposed to

1. Scope This document specifies a laboratory method for measuring the airborne sound insulation of building products, such as walls,