• Akustik
  • DS/EN ISO 3745:2012/A1:2017

DS/EN ISO 3745:2012/A1:2017

Akustik - Bestemmelse af lydeffektniveau og lydenerginiveau for støjkilder ved hjælp af lydtryk - Præcisionsmetode for lyddøde rum samt lyddøde rum med et reflekterende plan

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Harmoniseret under:
  • Europa-Parlamentets og Rådets direktiv 2006/42/EF af 17. maj 2006 om maskiner og om ændring af direktiv 95/16/EF (omarbejdning)

Harmoniserede standarder:


1.1 General
This International Standard specifies methods for measuring the sound pressure levels on a measurement surface enveloping a noise source (machinery or equipment) in an anechoic room or a hemianechoic room.
The sound power level (or, in the case of impulsive or transient noise emission, the sound energy level) produced by the noise source, in frequency bands of width onethird
octave or with frequency weighting A applied, is calculated using those measurements, including corrections to allow for any differences between the meteorological conditions at the time and place of the test and those corresponding to a reference characteristic acoustic impedance.
In general, the frequency range of interest includes the onethirdoctave
bands with midband frequencies from 100 Hz to 10 000 Hz. In practice, the range is extended or restricted to frequencies beyond or within these limits, to those between which the test room is qualified for the purposes of the measurements.
1.2 Types of noise and noise sources
The methods specified in this International Standard are suitable for all types of noise (steady, nonsteady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001.
The noise source under test can be a device, machine, component or subassembly.
The maximum size of the noise source depends on specified requirements regarding the radius of the hypothetical sphere or hemisphere used as the enveloping measurement surface.
1.3 Test room
The test rooms that are applicable for measurements made in accordance with this International Standard are an anechoic room or hemianechoic
room, also called, respectively, a freefield
test room or hemifreefield test room.

Antal sider: 16

Udgivet: 2017-05-18

Godkendelsesdato: 2017-05-16

Internationale relationer : EN ISO 3745:2012/A1:2017 IDT ISO 3745:2012/Amd 1:2017 IDT

ICS: 17.140.01 - Akustiske målinger og støjbekæmpelse generelt

Varenummer: M295763

Udvalg og komiteer


  • CEN/TC 211
  • ISO/TC 43/SC 1
  • ISO/TC 43/SC 1
  • ISO/TC 43/SC 1/WG 28
  • ISO/TC 43/SC 1/WG 28

Dansk udvalg