Items tagged with SOUND Files

File size: 1.39 MB Download

Acoustic design of open-plan offices (NT TR 619)

NT TR 619

  • This application could serve as a practical tool for the acoustic planning of open-plan offices. The acoustic conditions in open-plan offices were investigated in a Nordic cooperation project. Measurements were carried out in five open-plan offices along with a questionnaire to gather the staff’s subjective judgments. A programme for the acoustic measurements was drawn up, specifying how to perform the measurements and which type of parameters to measure.

File size: 2.46 MB Download

Determination in the field of structure-borne sound source strength of building service equipment - A pilot study with inter-laboratory comparisons and a proposal for a Nordtest method (NT TR 616)

NT TR 616

  • A pilot project with an inter-laboratory comparison (round robin) has been performed, where a modified heavy duty washing machine has been circulated for tests among 7 laboratories. The main goal of this pilot project was to find out whether a simple substitution method could be applied to determine the structure-borne sound source strength of typical building service equipments.

File size: 3.64 MB Download

Reproducibility of measurements with ISO 140 and calculations with EN 12354 (NT TR 603)

NT TR 603

  • Uncertainties of measurement and prediction of the sound insulation in a building is an important issue to the building industry, because they put increased expenses on all actors of the building process who have to keep safety margins to prescribed requirements. This report deals with estimates of both types of uncertainty and some recommendations on suitable safety margins are given.

File size: 344.79 KB Download

Measurement of drum sound (NT TR 573)

NT TR 573

  • The interest in the effect of background noise on our health and capacity for work has increased. One of the disturbing factors in office spaces, schools etc. is the drum sound, especially when the flooring consists of thin wood parquet or laminate. Drum sound is the noise that appears when an object, e.g. a foot, hits the flooring in the same room as the receiving ear.

File size: 2.14 MB Download

Road traffic - Vehicle noise emission (NT TR 557)

NT TR 557

  • A method for the determination of source parameters for estimation of road vehicle noise has been developed. The main parts of the method have been tested with measurements and this verifies that the method can be used in practice.

File size: 3.68 MB Download

Measurement of Drum Noise - A Pilot Project (NT TR 556)

NT TR 556

  • Drum noise from floors and floorings has been a building acoustics issue for many years although an international standardized measurement method has never been made.

File size: 701.90 KB Download

Laboratory measurement of sound insulation in the frequency range 50 Hz to 160 Hz – A Nordic intercomparison (NT TR 489 - edition 1)

NT TR 489 - Edition 1

  • Five Nordic laboratories have carried through an intercomparison concerning laboratory measurements of sound insulation at low frequencies. Measurements have been carried out on two different test objects – a sandwich steel plate and a window - in the frequency range 50 Hz to 160 Hz according to ISO/DIS 15186-3, which describes a new test method based on intensity technique.

File size: 710.23 KB Download

Laboratory measurement of sound insulation in the frequency range 50 Hz to 160 Hz – A Nordic intercomparison (NT TR 489)

NT TR 489

  • Five Nordic laboratories have carried through an intercomparison concerning laboratory measurements of sound insulation at low frequencies. Measurements have been carried out on two different test objects – a sandwich steel plate and a window - in the frequency range 50 Hz to 160 Hz according to ISO/DIS 15186-3, which describes a new test method based on intensity technique.

File size: 1.19 MB Download

A simplified method to determine impact sound improvement on light-weight floors (NT TR 488)

NT TR 488

  • It is well known that the impact sound improvement for floor coverings on lightweight floors is very different from that on heavy concrete slabs. Most laboratories have only one test opening and it is expensive to change floors. Thus it would be preferable if it were possible to use a simpler test procedure. In this paper such a procedure is outlined and discussed.

File size: 38.85 KB Download

Machines: Determination of emission sound pressure levels using sound intensity (NT ACOU 097)

NT ACOU 097

  • This NORDTEST method specifies how to determine theemission sound pressure level at the work station or at other specified positions of machines using sound intensity.

File size: 52.21 KB Download

Floor coverings, concrete or timber joist floors: Rating of impactsound improvement (NT ACOU 034)

NT ACOU 034

  • This NORDTEST method specifies a method of evaluating a single number index which describes the improvement in impact sound insulation due to a floor covering laid on a concrete floor.

Nordtest

Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.