| What we do... Besides financial aspects and special product demands, regarding the environment in which measures are to be taken, health-legislation is very important. Legislation states the order in which measures are to be taken when reducing noise on the work floor. We visit the problem site or analyse existing measurement reports provided by health services or noise consultants. This results in a plan as how to reduce the noise on-site. The next pages show some basic solutions to noise problems, all of which we can provide for you... |
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Basic solutions Tailor-made solutions require tailor-made products. Acour engineers, produces and installs (e.g.):
We also carry out sound level measurements and reverberation time measurements. |
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Sound level measurements For calculation, engineering purposes and to guarantee the result of the noise-reducing measures, Acour can carry out sound level measurements. Results are reported to our client in a short and understandable report. We can provide:
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Reverberation time measurements The reverberation time characterizes the acoustical 'climate' of a room. The amount of reflection in a room is determined. This gives information about the decrease in sound-level, based on the distance to the sound-source. A sound pulse (gunshot) is fired into the room. The reverberation time is the time for the sound level to drop 60 dB. Reverberation times are measured for the different octaves. |
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Silencers To reduce the noise of air-ducts, intake openings and outlets, silencers or sound-insulating grills can be used. Special products are available for contaminated or aggressive media. |
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Cylindrical silencers Fan noise, duct noise as well as noise through grills and filters, combined with numerous reflections, often cause high sound levels at intakes and exhausts of duct-systems. Sound-absorbing cylindrical silencers can effectively reduce this noise. These silencers are used for (cooling) air-intake and exhaust on motors and generators, fan outlets and extraction systems of kitchens or bakeries. A cylindrical silencer consists of a perforated steel inner shell (duct diameter) and a wider closed steel outer shell. The room between the shells is filled with sound absorbing material, protected with a thin fibre-sheet to prevent erosion by the medium going through the silencer. Lenght and diameter of the silencer as well as the thickness of the absorption material are calculated, based on flow-speed, the noise reduction needed and the room available on-site. |
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Baffle-type silencers Sound-insulating baffle-type silencers, incorporated in duct systems, can effectively reduce noise. These silencers are used for (cooling) air-intake and exhaust on motors and generators, air-conditioning or ventilation systems in buildings and ventilation openings in enclosures and cabins. The insulating properties depend primarily on flow speed and silencer length, on duct size, the number of baffles and the thickness of the baffles. With good design reductions up to 50 dB can be achieved for both low and high frequencies. |
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Sound-insulating grills Ventilation openings in walls are almost always a sound-leak. Sound insulation with little flow disturbance can be achieved with insulating grills. Used in:
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Enclosures [1] Acour designs, produces and installs tailor-made sound insulating enclosures for all kinds of (industrial) sound sources. The enclosures stand out not only by acoustical properties, but also by design, stability and finish. Communication between Acour and the client is essential during the complete process to obtain useable, tailor-made solutions for specific noise problems. Enclosures are basically built out of steel panels, perforated on the inside and filled with a carefully selected combination (based on the frequencies to be reduced) of insulating and absorbing materials. Depending on the size of the enclosure, a construction with coupled panels or with the panels attached in a frame is chosen. |
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Enclosures [2] As to size there are no limits . Very large enclosures stay stable and can be walked on due to the frame construction. Small enclosures are built out of panels, connected by heavy quick fasteners. Materials, finish, coating etc. are all chosen based on the conditions in your production environment. Other points of attention are:
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Enclosures [3] - Related products Acour also designs, produces and installs:
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Room-acoustics [1] Acoustical conditioning by sound-absorbing baffles or ceilings improves concentration, communication and safety on the work floor.This is done by reducing reverberation time and sound level. Measures to improve room-acoustic properties are taken in 'hard' rooms (i.e. where walls, floor and ceiling are higly reflective) like production-halls or large offices. If the ceiling needs to be accessible or can not be closed up for other reasons (daylight entry, hygiene reasons), often baffles can be mounted. Acour can supply many types, including special baffles for hygienic purposes. By hanging baffles, directly from the ceiling or from a supporting structure, ventilation-systems and ducting stay accessible. Lighting fixtures can be integrated between the baffles or lowered to be suspended just below the baffles. |
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Room-acoustics [2] Also in places where a closed (suspended) ceiling is desired, an optimal acoustical situation can be realised. Closed ceiling systems are mainly used in schools, offices, receptions and other rooms with representative functions. In some food industries closed ceilings are the best choice. We can also provide:
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Room-acoustics [3] - Related products Acour also designs, produces and installs:
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