NT Methods Archive

Here you can find and download all published NT Methods.

NT Methods Files

File size: 40.97 KB Download

Rooms: Reverberation time (NT ACOU 053)

NT ACOU 053

  • This document specifies methods to measure the reverberation time in rooms.

File size: 41.00 KB Download

Sheet folding machines: Noise (NT ACOU 052)

NT ACOU 052

  • This NORDTEST method specifies operating conditions and methods to determine the sound power level and the sound pressure level at the operator's position of sheet fed folding machines such as buckling, knife folding, rotary folding machines, machines for folding in quires, heliographic folding machines, combined buckling and knife folding machines.

File size: 62.65 KB Download

Comminuting machines: Noise (NT ACOU 051)

NT ACOU 051

  • This NORDTEST method specifies operating conditions and methods to determine the sound power level and the sound pressure level at the operator's position of comminuting machines used in the plastics industries.

File size: 70.69 KB Download

Rooms: Noise level (NT ACOU 042)

NT ACOU 042

  • This document specifies methods for measuring the A-weighted sound pressure level in rooms. The A-weighted sound pressure level is assumed to be due to noise from sources within the building. Guidelines for the correction of measurements made under one condition to values representative of other conditions are given in ANNEX A. ANNEX A is not an integral part of this method.

File size: 70.69 KB Download

Reverberant test rooms: Sound absorption - Reference sound source (NT ACOU 040)

NT ACOU 040

  • This document specifies a NORDTEST method, using a reference sound source, for determination of the normalization constant 10 lg A of a room.

File size: 422.85 KB Download

Road traffic: Measurement of noise immission - Engineering method (NT ACOU 039)

NT ACOU 039

  • This NORDTEST method states procedures for measuring road traffic noise inside and outside buildings and in open terrain, under specified traffic and environmental conditions.

File size: 72.28 KB Download

Noise absorber pads: Sound absorption (NT ACOU 038)

NT ACOU 038

  • This NORDTEST method contains supplementary specifications to the measurement procedure stated in ISO/R 354-1963 (E) with regard to measurements on discrete sound absorbers, like noise absorber pads.

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.

File size: 153.76 KB Download

Bulkheads: Sound radiation efficiency - Laboratory testa (NT ACOU 033)

NT ACOU 033

  • This NORDTEST method describes a laboratory method of measuring the sound radiation efficiency of bulkheads, when excited mechanically into resonant, flexural vibrations.

File size: 31.79 KB Download

Acoustical screens: Sound absorption (NT ACOU 032)

NT ACOU 032

  • This NORDTEST method contains some supplementary specifications to the measurement procedure stated in ISO/R354-1963 with respect to measurements on screens.

File size: 99.19 KB Download

Hearing aid - induction loop systems: Measurement of the magnetic field characteristics (NT ACOU 014)

NT ACOU 014

  • This NORDTEST method applies to complete audio induction loop systems for hearing aid purposes, permanently installed in rooms and consisting of signal sources (e.g. microphones), amplifiers and induction loops. Parts of the method described may, where relevant, also apply to other induction loop systems.

File size: 122.82 KB Download

Validation of the functional safety of programmable electronic systems (PES): Framework (NT ELEC 033)

NT

  • This test method adresses aspects that need to be validated when programmable electronic systems are used to carry out safety functions.

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