USAGE－NOISESTOP PAC40&PAC30 Acoustic Panels have been specifically designed to meet increasing requirement to shield personnel from high noise level emitted from certain plant and machinery. The NOISESTOP PAC40&PAC30 panel systems provide average attenuations across the audible frequency spectrum of 38db and 33db respectively and will attenuate most noise emissions to below the presently recommended safe working levels. NOISESTOP PAC40&PAC30 Acoustic Panels have a plain exterior surface and a perforated inner surface with an acoustically absorbent media being contained between the skins. The external surface of the panels is acoustically damped to eliminate local resonance and the inner perforated surface allows exposure of the acoustically absorbent media to the noise source in order to approximate the noise level around the enclosed machinery to free field conditions. NOISESTOP PAC40&PAC30 Acoustic Panels can be used as barriers between quiet and noisy areas or in the form of complete housings around noisy plant. The panels are supplied complete with floor, roof and intermediate vertical joints to allow fast and simple site erection. As part of an individual enclosure design ventilation system, complete with suitable silencers, can be provided in order to dissipate the heat emissions from the enclosed machinery. Access doors, inspection windows and acoustically sealed openings for the passage of piping etc. can also be provided with no reduction in the acoustic performance of the final design. Typical applications of NOISESTOP PAC40&PAC30 Acoustic Panels are the enclosure of Turbo-generators, Turbo-compressors, Diesel driven generators, pumps, fans and mechanical presses. Audiometric Rooms and Quiet Havens for personnel can also be constructed from NOISESTOP PAC40&PAC30 Acoustic Panels. In order to discuss your particular requirements it is advisable to consult a NOISESTOP engineer who will be pleased to help in the formulation of a detailed design layout to meet your specific acoustic performance criteria.

CONSTRUCTION－Standard NOISESTOP PAC40&PAC30 Acoustic Panels are formed from a plain mild outer sheet and a perforated galvanised steel inner sheet. The inner surface is suitably stiffened to prevent deformation of the panel during site and the acoustic media contained in the panels is inert non-flammable mineral wool. The standard thickness of NOISESTOP PAC 40 Acoustic Panels is 100mm and of PAC 30 panels is 50mm. The normal finish of NOISESTOP PAC40&PAC30 Acoustic Panels is primed ready for finish painting on site by the customer but alternatively panels can be supplied with external surfaces finished in aluminium, galvanised steel, plastic coated steel or finish painted to the customers specification. Doors windows and sealed openings are normally fitted during site erection and all the necessary fittings and fixings are supplied with the panels. Double and single leaf doors are fitted with quick release safely catches so that personnel can escape from within enclosures even when the access door is inadvertently locked shut. Window panels are provided with silica gel absorbent elements to eliminate condensation within the air space formed by the two window panels. Cellular rubber seals are incorporated into floor and roof channels as well as around the periphery of doors and windows and all other jointers are mastic sealed during erection to maintain the acoustic integrity of the complete enclosure. Structural steelwork or internal supports for ducting, silencers or other equipment can be incorporated into individual enclosure designs and details of this and all other aspects of an enclosure are shown on a full set of drawings provided to the client for his approval prior to manufacture.

TYPICAL SPECIFICATION－The diesel driven generator set shall be enclosure in a self contained NOISESTOP PAC 40 Acoustic Panel enclosure to maintain the noise level laid down in the specification. The enclosure will be complete with two double leaf access doors, seals openings around the electrical cables and exhaust piping, an inspection window and an adequate ventilation system to dissipate the heat emission from the generator set. The enclosure shall be finished externally in one coat of grey primer for final painting by the contractor.