DS/EN ISO 717-2:2020

Acoustics – Rating of sound insulation in buildings and of building elements – Part 2: Impact sound insulation (ISO 717-2:2020)

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This part of ISO 717:
a) defines single-number quantities for impact sound insulation in buildings and of floors;
b) gives rules for determining these quantities from the results of measurements
carried out in one-third-octave bands in accordance with ISO 10140-3 and ISO 16283-2, and in
octave bands in accordance with that option in ISO 16283-2 for field measurements only;
c) defines single-number quantities for the impact sound reduction of floor coverings
and floating floors calculated from the results of measurements carried out in accordance with
ISO 10140-3;
d) specifies a procedure for evaluating the weighted reduction in impact sound pressure level by
floor coverings on lightweight floors.
The single-number quantities in accordance with this part of ISO 717 are intended for rating impact
sound insulation and for simplifying the formulation of acoustical requirements in building codes.
An additional single-number evaluation in steps of 0,1 dB is indicated for the
expression of uncertainty (except for spectrum adaptation terms).The required numerical values of
the single-number quantities are specified according to varying needs.
The rating of results from measurements carried out over an enlarged frequency range is described
in Annex A.
A method for obtaining single-number quantities for bare heavy floors according to their
performance in combination with floor coverings is described in Annex B.
Examples of the calculation of a single-number quantity is given in Annex C.
A method for rating heavy/soft impact sound insulation performance of building and building
materials by A-weighted maximum impact sound pressure level is given in Annex D.

Number of pages: 36

Published: 2020-12-22

Date of approval: 2020-12-21

International relationships : EN ISO 717-2:2020 IDT ISO 717-2:2020 IDT

ICS: 91.120.20 - Acoustics in building. Sound insulation

Item number: M338131



  • CEN/TC 126
  • ISO/TC 43/SC 2
  • ISO/TC 43/SC 2/WG 18

Danish committee