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Document ID (ISN)68428
CIS number 97-267
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 1996
Convention or series no.
Author(s) Thomé J.P.
Title Influence of noise leaks on the acoustic efficiency of machine enclosures
Original title Importance des fuites acoustiques sur l'efficacité globale d'un capotage de machine [in French]
Bibliographic information 4th Quarter 1996, No.165, Note No.2036-165-96, p.509-518. Illus. 12 ref.
Internet access [in French]
Abstract Acoustic enclosures and hoods are widely used to reduce machine noise in the industrial environment. Unfortunately these devices are never entirely soundproof, and noise leakage tends to reduce their overall efficiency. Theoretical models exist for predicting the acoustic behaviour of slits in enclosure panels by calculating the amount of energy transmitted and describing the spatial distribution pattern (directivity) of the radiated sound field. This paper briefly examines two of these models which are simple to use for practitioners working on the "sound-tightness" of enclosures, and proposes technical solutions for reducing noise transmission through most types of commercial enclosures at the design stage: sealing compounds, flaps and profiled seals, noise baffles, acoustically absorbent materials, reactive mufflers.
Descriptors (primary) noise; acoustics; leakage; sound attenuation; acoustic enclosure; noise control
Descriptors (secondary) sound absorption; rim exhaust; sound transmission loss
Document type D - Periodical articles
Country / State or ProvinceFrance
Subject(s) Noise, hearing and vibration
Broad subject area(s) Physical hazards
Browse category(ies) Noise