ISO/TS 19488:2021 pdf – Acoustics — Acoustic classification of dwellings.
1 Scope This document describes criteria and procedures for acoustic classification of dwellings. The purpose of this document is to make it easier for developers to specify a classified level of acoustic quality for a dwelling, and help users and builders to be informed about the acoustic conditions and define increased acoustic quality. The document can also be applied as a general tool to characterize the quality of the existing housing stock and includes provisions for classifying the acoustic quality before and after renovation has taken place. By the acoustic quality for a dwelling is understood the quality of the acoustic performances typically included in building regulations, e.g. sound insulation towards neighbouring premises and road traffic as well as sound from service equipment. Sound insulation and room acoustics internally in a dwelling are not included in the acoustic classes defined. This document does not have a legal status in a country, unless decided by its own authorities. However, an additional purpose of this document is to help national authorities and standardization organisations to develop or revise national building regulations and acoustic classification schemes. For the purpose of this document, the term ”dwellings” refers to detached and attached dwelling- houses, buildings with several flats as well as individual dwellings, and a dwelling is the living space for a household. 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. ISO 717-1, Acoustics — Rating of sound insulation in buildings and of building elements — Part 1: Airborne sound insulation
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: — ISO Online browsing platform: available at https://www.iso .org/obp — IEC Electropedia: available at http://www.electropedia .org/ 3.1 General 3.1.1 airborne sound insulation insulation against airborne sound measured in accordance with ISO 16283-1 and determined in frequency bands (one-third-octave bands or octave bands) from which single-number ratings for the building performance can be obtained in accordance with ISO 717-1 Note 1 to entry: Single number ratings are expressed in decibels. Note 2 to entry: Conversion between different single number quantities, e.g. between R ’ w and D nT,w , is described in ISO 12354-1. 3.1.2 impact sound insulation insulation against impact sound measured as an impact sound pressure level in accordance with ISO 16283-2 and determined in frequency bands (one-third octave bands or octave bands) from which single-number ratings for the building performance can be obtained in accordance with ISO 717-2 Note 1 to entry: Single number ratings are expressed in decibels. Note 2 to entry: In ISO 717-2, it is referred to as impact sound pressure level. Note 3 to entry: Conversion between different single number quantities, e.g. between L’ n,w and L’ nT,w , is described in ISO 12354-2. 3.1.3 airborne sound insulation of building envelopes insulation against sound from the outside measured in accordance with ISO 16283-3 and determined in frequency bands (one-third-octave bands or octave bands) from which single-number ratings for the building performance can be obtained in accordance with ISO 717-1 Note 1 to entry: Single number ratings are expressed in decibels.
3.1.10 habitable room room which provides the accommodation of the dwelling, including living room, dining room, study, home office, conservatory, bedroom, etc., excluding bathroom, WC, utility room, store room and circulation space 3.1.11 access area any type of area which is accessible to all habitants in the building, such as stairwells, corridors, central lobby areas, passageways and other communal areas shared with other units 3.2 Classes and single-number quantities to express building performance 3.2.1 class category specifying a defined level of acoustic conditions in dwellings Note 1 to entry: The classes are A, B, C, D, E, F and NPD. Note 2 to entry: The indication NPD (no performance determined) can be used for dwellings where no acoustic performance is required or determined, or if the performance does not comply with class F. 3.2.2 weighted standardized level difference D nT,w difference in the space and time average sound pressure levels in two rooms produced by one or more sound sources in one of them, corresponding to a reference value of the reverberation time in the receiving room in accordance with ISO 16283-1 and weighted to a single number according to ISO 717-1 Note 1 to entry: D nT,w is expressed in decibels. 3.2.3 standardized A-weighted level difference D nT,A sum of the weighted standardized level difference (3.2.2), D nT,w , and the spectrum adaptation term, C , according to ISO 717-1 (D nT,A = D nT,w + C ) Note 1 to entry: D nT, A is expressed in decibels.