This Nordtest Method specifies a method of measuring in the laboratory, the noise emission (sound power level) from a radiator valve coupled to a specified reference radiator when a flow of water is forced through the valve at specified reference operating conditions.
This Nordtest method provides quidelines for determining the A-weighted declared single-number and dual-number noise emission values of machinery and equipment based on the determination of their spectrum or A- and C-weighted noise levels.
This NORDTEST method applies to hearing aids having automatic gain control (AGC) or similar adaptive circuitry. The method uses broad band noise to give reproducible characteristics of the electroacoustical properties of a hearing aid.
This Nordtest method specifies a laboratory sound intensity scanning method of measuring the airborne sound insulation of such small building elements as are defined below. This method also establishes directions about reporting and applying such test data.
This NORDTEST method specifies the way in which the sound power level of air terminal units, high/low velocity/pressure assemblies, dampers and valves used in air diffusion and air distribution is to be determined usin sound intensity.
This Nordtest method specifies the way in which sound pressure levels are to be measured under prescribed conditions and the way in which prescribed positions around a wind turbine and the way in which the source strength and other acoustical parameters are to be calculated from the measured sound pressure levels.
This Nordtest method specifies operating conditions and methods to determine the sound power level and the emission sound pressure level at the work station of vibratory plate compactors. The results can be used to compare different vibratory plate compactors.
This Nordtest method specifies a method for mobile walls by which a relation is established between the airborne sound insulation measured in the laboratory and the airborne sound insulation to be expected in the field.
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.
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.
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.
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.
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.
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.
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”.