Enclosures for big noise sources
Enclosures for big noise sources are intended for turbines, diesel-generator sets, turbine-generator sets, big industrial fans and blowers, co-generation units and other large noise sources. This category of large hoods covers also sound-damping cabins intended for the rest of people working in very noisy plants.
Characteristic of the hood:
| dimensions (length x width x height): |
according to the requirements of the customer |
| noise attenuation: | from 9 to 25 dB |
| wall thickness: | min. 50mm |
type of construction: demountable enclosure – acoustic panels attached to the supporting frame,
supporting structure with removable acoustic panels
construction of acoustic panels: sandwich version, external covering with steel, aluminium or stainless steel sheets of the thickness 1,5 mm, or 2 mm for robust panels
panels of the mass over 40 kg are provided with loops for being handled by a crane
| surface finishing: | according to the requirements of the customer |
| possible accessories: | ventilation units |
| acoustic labyrinth for ventilation air inlet | |
| electrical wiring | |
| cable bushings | |
| anti-noise door, gate | |
| anti-noise windows | |
| air-conditioning |
(taken from Center of environmental hygiene of State Health Institute Prague)
Noise is every unwanted sound that is disturbing or troublesome or that affects adversely human health. Negative effects of noise on human health are partly specific ones, presented by disorders of the function of acoustic analyzer, partly non-specific ones (extra hearing), when functions of various systems of the organism are affected. These non-specific system effects appear almost in the whole range of noise intensities, frequently they are accompanied by stress reaction and impact on neurohumoral a neurovegetative regulation, biochemical reactions, sleep, higher nervous functions, such as learning and memory, impact on sensory motoric functions and coordination.
…(more…)Authors:
RNDr. B. Madejewski,CSc., Ing. V. Kotrba, CSc.
The article describes the design, calculation and test results noise attenuation of the noise hood for large industrial compressors driven by electric motors. Predicted noise attenuation (software UTLUM) has been validated by practical measurements at the customer¢s place.
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