INDUSTRY

Tecnoacustica operates in the industrial sector basically on two fronts:

  • The containment of operator exposure to noise levels from production machinery in compliance with Legislative Decree No. 81/2008

  • The containment of noise emissions to the outside in compliance with Prime Minister's Decree (DPCM) 14/11/1997 and subsequent amendments

Tecnoacustica designs, manufactures and installs noise reduction systems that comply with legal requirements and is able to provide firm noise reduction guarantees by always testing its own work.

Thanks to the esteem and trust of our Customers, we have had the opportunity to carry out different types of soundproofing interventions with the greatest customer satisfaction, providing them with our advice and our "turnkey" service.

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Control Room

The control rooms or operator booths have been designed essentially for automatic or semi-automatic production facilities in which, given the large size of the plant itself and the inability to completely contain it within silent walls, it is advisable to have an acoustically protected area where operators can manage the system from a control panel.

The control rooms are silent spaces, ergonomically designed so that workers can operate in an environment that is comfortable both from a temperature and lighting perspective. In the control rooms there is normally both a dropped ceiling and a raised floor to ensure sufficient space for all control panel, air conditioning and lighting connections. In the control rooms there are always large windows made of laminated safety glass, insulated both thermally and acoustically, allowing operators to monitor the machinery with as open a view as possible to ensure a rapid response in emergency situations.

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SILENT BOXES

The silent boxes isolate particularly noisy machinery, such as compressors, co-generators, power generators and noisy machinery in general, and, depending on the noise reduction levels required, they can be completely closed or partially open.

In the closed boxes particular attention must be paid to the energy balance within the box itself, in other words to the heat that must be dissipated through ventilation. This requires extraction and/or supply fans and therefore inlet openings and air outlets, which must adequately silenced using silencers that dissipate the sound energy through sound-absorbing baffles. These silencers must be suitably designed in keeping with the sound reduction levels required by the wall.

In the boxes there are always silent doors, as an emergency exit, with panic push-bars. Furthermore, it is often necessary to include double silent doors to allow maximum access to the machine and ensure both preventive and repair maintenance.

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SILENT WALLS

The silent partition walls are used within productive environments in order to divide particularly noisy production environments from quieter environments or to separate a large production system from the rest of ​​the department. The silent walls within a production department are usually full-height.

It is often necessary to include several access doors and have many transparent surfaces in the silent walls in order to allow the widest possible field of vision for operators on the other side of the wall of all the important parts of the system and to guarantee monitoring and emergency interventions.

In the case of a subdivision into different working areas, the silent wall can also be totally blind and must be suitably fitted with sufficient emergency exits complete with panic push-bars and high window.

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FIXED AND MOVABLE SCREENS

Partial, fixed or movable screens are used when the sources of sound are not particularly noisy and are small. The movable screens were created to contain noisy activities that may be carried out in different places within the plant (for example: grinding, welding etc.) and it can therefore be easily moved as required.

Both the fixed and movable screens do not normally exceed 2.5÷3.0 metres in height for reasons of stability. They can also be bi-absorbent and equipped with sound-insulating window sections if the field of vision must not be blocked.

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SILENCERS

There are two types of silencers: sound-absorbing or sound dissipating with baffles.

Usually the sound-absorbing silencers are used for the intake and exhaust of: internal combustion engines, gas turbines, reciprocating and centrifugal compressors, electric motors, axial fans, ventilation and air conditioning systems, atmosphere vents and drains for non-critical conditions.

 

The sound dissipating silencers with baffles are used for industrial purposes in boxes where the internal heat generated by the plant must be disposed of through the insertion of input openings and air outlets. They can also be used to silence noise at the exhausts.

Their size is based on geometric parameters such as the ratio between perimeter and area of ​​the individual channels that are created between the baffles, their length, and acoustic parameters such as the absorption coefficients of sound-absorbing baffles.

The shape of the sound-dissipating silencer with baffles is usually rectangular. Cylindrical sound-dissipating silencers, with or without central ogive, are mainly used for plant engineering purposes. Also, in this case, their abatement is based both on the geometric and acoustic parameters.

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ENVIRONMENTAL ACOUSTIC TREATMENT

 In noisy industrial environments where it is not possible to segregate themachines or shield them effectively and when the operator's activities are carried out directly at the machine, the only way to lower the operator's level of sound exposure is to acoustically treat the environment, minimizing the reverberation and thus the amount of reflected sound energy. The reduction that can be achieved by operating with a suitable sound absorbing treatment can go from a minimum of 2 dB(A) to a maximum of 6 dB(A).

Prior to acoustically treating the environment a careful study should be carried out to analyse the acoustic noise spectra produced by the machines, the reverberation times at various frequencies inside the department to evaluate the material of the surfaces used to delimit the area, the position of the machines and the operators.

The acoustic study identifies the type of treatment, the type of sound-absorbing material, how many absorbing units and the amount of material that must be used and the best place to position it to achieve the sound-reduction objective. You can later verify the reduction in the worker's level of noise exposure that has been obtained through environmental treatment.

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