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Normas DIN – AENOR
DIN EN ISO 3745:2010-05

DIN EN ISO 3745:2010-05

Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms (ISO/DIS 3745:2010); German version prEN ISO 3745:2010 / Note: Date of issue 2010-05-25

Acoustique - Détermination des niveaux de puissance et d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique - Méthodes de laboratoire pour les salles anéchoïques et semi-anéchoïques (ISO/DIS 3745:2010); Version allemande prEN ISO 3745:2010 / Attention: Date de parution 2010-05-25

Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel von Geräuschquellen aus Schalldruckmessungen - Verfahren der Genauigkeitsklasse 1 für reflexionsarme Räume und Halbräume (ISO/DIS 3745:2010); Deutsche Fassung prEN ISO 3745:2010 / Achtung: Erscheinungsdatum 2010-05-25

Fecha Anulación:
2012-07 /Withdrawn
Equivalencias internacionales:

ISO/DIS 3745 (2010-05)

prEN ISO 3745 (2010-05)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 3745:2012-07

Resumen:
This standard specifies methods for measuring the sound pressure levels on a measurement surface enveloping a noise source (machinery or equipment) in a free-field test room or a hemi-free-field test 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 one-third octave or with frequency weighting A applied, is calculated using those measurements. The resulting sound power levels and sound energy levels include corrections to allow for any differences that might exist between the meteorological conditions under which the tests are conducted and reference meteorological conditions. In general, the frequency range of interest includes the one-third-octave bands with mid-band frequencies from 100 Hz to 10000 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. The methods specified in this Standard are suitable for all types of noise (steady, non-steady, fluctuating, etc.) defined in ISO 12001. The noise source under test may be a device, machine, component or sub-assembly. The maximum size of the noise source depends on requirements regarding the radius of the hypothetical sphere or hemisphere used as the enveloping measurement surface. The test rooms that are applicable for measurements made in accordance with this Standard are an anechoic test room or hemi-anechoic test room, also called, respectively, free-field room or a hemi-free-field room. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with this Standard, for measurements made in limited bands of frequency and with frequency weighting A applied. The uncertainty conforms with that of the precision grade of accuracy (grade 1) defined in ISO 12001.
Keywords:
Acoustic measurement, Acoustics, Closed test rooms, Definitions, Enveloping surface methods, Laboratory testing, Laboratory tests, Mathematical calculations, Measurement, Measuring techniques, Noise (environmental), Noise measurement, Noise sources, Reflection, Reverberation rooms, Sound energy, Sound intensity, Sound level, Sound levels, Sound power, Sound pressure, Sound pressure level, Sound sources
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