ABNT Catálogo
ABNT Catálogo
Norma Técnica
Código
ISO 3744:2010  
Data de Publicação : 22/09/2010
Título : Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Engineering methods for an essentially free field over a reflecting plane
Título Idioma Sec. : Acoustique -- Détermination des niveaux de puissance acoustique et des niveaux d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique -- Méthodes d'expertise pour des conditions approchant celles du champ libre sur plan réfléchissant
Comitê : ISO/TC 43 Acoustics
Páginas : 78
Status : Em Vigor  
Idioma : Inglês
Organismo : ISO - International Organization for Standardization
Preço (R$) : 1424,00
Objetivo : ISO 3744:2010 specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in an environment that approximates to an acoustic free field near one or more reflecting planes. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands or with frequency A-weighting applied, is calculated using those measurements. The methods specified in ISO 3744:2010 are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. ISO 3744:2010 is applicable to all types and sizes of noise source (e.g. stationary or slowly moving plant, installation, machine, component or sub-assembly), provided the conditions for the measurements can be met. The test environments that are applicable for measurements made in accordance with ISO 3744:2010 can be located indoors or outdoors, with one or more sound-reflecting planes present on or near which the noise source under test is mounted. The ideal environment is a completely open space with no bounding or reflecting surfaces other than the reflecting plane(s) (such as that provided by a qualified hemi-anechoic chamber), but procedures are given for applying corrections (within limits that are specified) in the case of environments that are less than ideal. Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3744:2010, for measurements made in limited bands of frequency and with frequency A-weighting applied. The uncertainty conforms to ISO 12001:1996, accuracy grade 2 (engineering grade).
Normas Necessárias para a aplicação da ISO 3744:2010
ICS/CIN
17.140.01 - Medições acústicas e atenuação de ruído em geral
Palavras-Chave
 
CURSOS (0 itens)
 
 
 
   
 
PUBLICAÇÕES (0 itens)
 
 
 
   

Informamos que a partir de 04/05/2020 atenderemos
em horário reduzido, das 9 h às 16 h, de segunda a sexta.

Suporte : (11) 3017-3621 suporte@abnt.org.br
Vendas: (11) 3017-3610 / 3648 / 3663 atendimento.sp@abnt.org.br
Certificação: (11) 3017-3691 certificacao@abnt.org.br
Informações sobre Cursos: Capacitacao (11) 3017-3680 / 3681 / 3683 cursos@abnt.org.br
Informações técnicas sobre normas: (11) 3017-3645 / 3646 cit@abnt.org.br
Copyright 2020© - Associação Brasileira de Normas Técnicas