ISO INTERNATIONAL STANDARD 9052-1 First edition 1989-02-15 Acoustics - Determination of dynamic stiffness Part 1 : Materials used under floating floors in dwellings Acoustique-Déterminationdelaraideurdynamique Partie 1:Materiaux utilises sous les dalles flottantes dans les batiments d'habitation Referencenumber ISO 9052-1 : 1989 (E) ISO 9052-1: 1989 (E) Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through iSO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISo, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at International Standard ISO 9052-1 was prepared by Technical Committee ISO/TC 43, Acoustics. Iso 9052 will consist of the following parts, under the general title Acoustics - Deter- mination of dynamic stiffness: Par 1: Materials used under floating floors in dwellings Part 2:Materials used for vibration and sound insulation of equipment in buildings International Organization for Standardization,1989 ? Printed in Switzerland INTERNATIONALSTANDARD ISO 9052-1:1989 (E) Acoustics s Determination of dynamic stiffness Part 1: Materials used under floating floors in dwellings Scope 1 of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. This part of ISO 9052 specifies the test method for determining the dynamic stiffness of resilient materials used under floating ISo7626-2:-_2),Vibration and shock-Experimentaldeter- floors. Dynamic stiffness is one of the parameters that deter- mination of mechanical mobility Part2:Measurements mine the sound insulation of such floors in dwellings. using single-point translation excitation with an attached vibra- tion exciter. This part of ISO 9052 applies to the determination of dynamic Iso 9053 : -2), Acoustics stiffness per unit area of resilient materials with smooth sur- Materials for acoustical appli- faces (see clause 6) used in a continuous layer under floating cations-Determination ofairflow resistance. floors in dwellings. It does not apply to loadings lower than O,4 kPal, for example materials in wall linings, or greater than 4 kPal", for example materials under machinery foundations Definitions 3 (see note 2). 3.1 dynamic stiffness:The ratio of dynamic force to This part of ISO 9052 is mainly intended to be used for compar- dynamic displacement. ing production samples of similar materials of known specified quality. For the purposes of this part of ISo 9052, dynamic stiffness per unit area, s', is used and is given by the following equation: For restrictions concerning the airflow resistivity of the resilient material to be tested, see 8.2. F/S . . . (1) Ad NOTES The dependence of dynamic stiffness on prestatic load is of minor where importance in the case of materials usually applied in wall linings, for example polystyrene or mineral fibre. The differences between S is the area of the test specimen; dynamic stiffness values measured with a static load of 2 kPa in ac- cordance with this part of ISO 9052 and those measured with a very is the dynamic force acting perpendicularly on the test low preload are of the order of 10 % to 20 %. specimen; A further part of ISO 9052 will deal with the determination of Ad is the resulting dynamic change in thickness of the dynamic stiffness of materials used in