Acoustic Archive

Acoustic Files

File size: 90.31 KB Download

Acoustical screens: Rating and classification (NT ACOU 085)

NT ACOU 085

  • This Nordtest method gives methods for rating and classifying the sound attenuation and the sound absorption of screens intended for use in large rooms without partitions in order to increase speech privacy or noise insulation between working positions.

File size: 104.34 KB Download

Building elements: Sound insulation, intensity scanning under laboratory conditions (NT ACOU 084)

NT ACOU 084

  • This Nordtest method specifies a sound intensity scanning method to determine the sound reduction index, as defined by IS0 140/3, of a building element.

File size: 95.84 KB Download

Buildings: Vibration and shock, evaluation of annoyance (NT ACOU 082)

NT ACOU 082

  • This document specifies a method to measure the weighted acceleration level of vibration and shock in buildings for an evaluation of human annoyance from whole-body vibration.

File size: 52.35 KB Download

Ound signalling devices: Acoustic emission (NT ACOU 081)

NT ACOU 081

  • This NORDTEST method primarily specifies the way in which the acoustic properties of sound signalling devices are to be tested.

File size: 720.78 KB Download

Industrial plants: Noise emission (NT ACOU 080)

NT ACOU 080

  • This Nordtest engineering method specifies a method for measuring sound pressure levels at prescribed positions surrounding stationary noise sources at industrial plants and calculating the source strength based on the measured sound pressure levels.

File size: 65.90 KB Download

Air traffic: Noise immission, residental areas (NT ACOU 075)

NT ACOU 075

  • This document specifies a NORDTEST Method for measurements of outdoor air traffic noise immission in residential areas.

File size: 101.66 KB Download

Air traffic: Noise reductions of dwellings (NT ACOU 074)

NT ACOU 074

  • This document specifies a NORDTEST method for simple measurements of air traffic noise reduction of dwellings.

File size: 236.24 KB Download

Tapping machines - impact sound insulation: Verification procedure (NT ACOU 071)

NT ACOU 071

  • This verification procedure specifies tests to verify compliance with the characteristics specified in Appendix 1. 

File size: 61.18 KB Download

Noise sources - sound power level: Engineering method - reference sound source, in situ (NT ACOU 070)

NT ACOU 070

  • This NORDTEST engineering method specifies how to measure sound pressure levels produced at prescribed measurement points in the far or near field by the noise source under test and by a reference sound source.

File size: 172.33 KB Download

Doors in buildings: Airborne sound insulation (NT ACOU 069)

NT ACOU 069

  • This NORDTEST method describes how to determine the sound reduction index of doors in buildings, i.e., in the presence of surrounding party walls whose contribution to the sound transmission may be significant.

File size: 176.43 KB Download

Sound level meters: Verification procedure (NT ACOU 068)

NT ACOU 068

  • This document specifies test methods for control measurements on sound calibrators and on sound level meters for measuring timeweighted (S, F and I) and time-averaged (LACK and LEA) sound pressure levels.

File size: 363.38 KB Download

Windows: Traffic noise reduction indices (NT ACOU 061)

NT ACOU 061

  • The purpose of this NORDTEST merhod is to specify traffic noise reduction indices of windows and to give guidelines on how to use these indices.

File size: 70.42 KB Download

Rooms: Reverberation time – Interrupted noise precision method (NT ACOU 059)

NT ACOU 059

  • This document specifies a precision laboratory NORDTEST method of measuring reverberation times according to the interrupted noise method.

File size: 145.11 KB Download

Road traffic: Measurement of noise immission – survey method (NT ACOU 056)

NT ACOU 056

  • This Nordtest method states procedures for measuring road traffic noise inside and outside buildings and in open terrain, under specified traffic and environmental conditions, at distances up to 100 m from the road.

File size: 44.18 KB Download

Garden vehicles: Operator’s noise (NT ACOU 054)

NT ACOU 054

  • This document specifies a method for the measurement of driver's exposure to noise from machine powered garden vehicles.

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: 253.16 KB Download

Small building elements: sound insulation (NT ACOU 037 withdrawn)

NT ACOU 037

  • This document specifies a laboratory NORDTEST method of measuring airborne sound insulation of such small building elements as are defined under clause 2. The document also establishes directions about reporting and applying such test data.

    The results obtained may be used to develop building elements with approbiate acoustical proprties, to classify such elements according to their sound insulation properties and to etimate their influence on the sound insulation of partition constructions in buildings.

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.

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