EN ISO 18233:2006

Foreword
Introduction
1 Scope
2 Normative references
3 Terms definitions and abbreviated terms
  3.1 Terms and definitions
  3.2 Abbreviated terms
4 Designations
  4.1 Maximum length sequence method (MLS)
  4.2 Swept-sine method (SS)
5 Theory
  5.1 General
  5.2 Sound in a room
  5.3 Sound transmission between two rooms
  5.4 Using the frequency response function
6 Measurement of the impulse response
  6.1 General
  6.2 Excitation signal
  6.3 Measurement of the response
7 Measurement of the frequency response function
8 Precision
9 Test report
Annex A (normative) Maximum length sequence method
Annex B (normative) Swept-sine method
Bibliography

ISO 18233:2006 gives guidelines and specifies requirements for the application of new methods for the measurement of the acoustic properties of buildings and building elements. Guidelines and requirements for selection of the excitation signal, signal processing and environmental control are given, together with requirements for linearity and time-invariance for the systems to be tested.ISO 18233:2006 is applicable to such measurements as airborne sound insulation between rooms and of façades, measurement of reverberation time and other acoustic parameters of rooms, measurement of sound absorption in a reverberation room, and measurement of vibration level differences and loss factor.ISO 18233:2006 specifies methods to be used as substitutes for measurement methods specified in standards covering classical methods, such as ISO 140 (all parts), ISO 3382 (all parts) and ISO 17497-1.