ISO 10848-2:2017 音響学—隣接する部屋間の空中、衝撃、および建物のサービス機器の音の側面伝達の実験室および現場での測定—パート2：接合部の影響が小さい場合のタイプB要素への適用 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.

This second edition cancels and replaces the first edition (ISO 10848-2:2006), which has been technically revised. It also incorporates the Technical Corrigendum ISO 10848-2:2006/Cor. 1:2007. The main change is that the normalized flanking equipment sound pressure level has been introduced and it has been indicated that this document applies to Type B elements.

A list of all the parts in the ISO 10848 series can be found on the ISO website.

1 Scope

ISO 10848 (all parts) specifies measurement methods to characterize the flanking transmission of one or several building components. This document considers only laboratory measurements.

The measured quantities can be used to compare different products, or to express a requirement, or as input data for prediction methods, such as ISO 12354-1 and ISO 12354-2. However, the measured quantities D_n,f, L_n,f and L_ne0,f only represent the performance with the dimensions for the test specimens described in this document.

This document is referred to in ISO 10848-1:2017, 4.5 as being a supporting part of the frame document. It applies to Type B elements as defined in ISO 10848-1, such as suspended ceilings, access floors, light uninterrupted façades or floating floors. The transmission from one room to another can occur simultaneously through the test element and via the plenum (if any). For measurements made according to this document, the total sound transmission is determined and it is not possible to separate the two kinds of transmission.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

3.3

normalized flanking equipment sound pressure level

L_ne0,f

space and time averaged sound pressure level in the receiving room produced by a structure-borne sound source injecting a unit power (1 W) at different positions on a tested element in the source room, when the transmission only occurs through a specified flanking path and the result is normalized to an equivalent sound absorption area in the receiving room and is expressed in decibels according to

(3)

where

	L2e	is the average sound pressure level in the receiving room with a structure-borne sound source injecting 1 W into the tested element, in dB;
	A	is the equivalent sound absorption area in the receiving room, in m2;
	A0	is the reference equivalent sound absorption area, in m2; A0 = 10 m2.

Note 1 to entry: This quantity is expressed in decibels.

Note 2 to entry: For clarity, the term L_ne0,f is used when only one flanking path determines the sound transmission (such as with equipment installed on access floors or light façades) and the term L_ne0,f,ij is used when only one specified transmission path ij out of several paths is considered (such as with structure-borne sound transmission on junctions of three or four connected elements).

Bibliography