Keeping Equipment Running While Reducing Noise: Lessent Industrial Acoustic Enclosures

How can a factory make the area around continuously running equipment quieter without disrupting production? An equipment enclosure needs to address noise, heat removal, operation and maintenance together. Surrounding the machine is only part of the work. The installation must also allow it to keep operating under the required conditions.

Lessent’s published business scope includes sound-insulating rooms and industrial noise control, with design, manufacturing and engineering implementation.[1][2] This approach brings the enclosure structure, acoustically treated ventilation, operating visibility and servicing arrangements into a single plan before deciding whether a full enclosure suits the particular machine.

Start with a working day

Before planning the enclosure, walk through a normal shift: when the machine starts, when its load is highest, where people observe and operate it, how materials move through the area, and how servicing takes place after shutdown. This provides a more useful brief than room dimensions alone.

If the main problem comes from loose parts, wear or abnormal vibration, address the machine itself first. The UK Health and Safety Executive (HSE) identifies source control, equipment maintenance and workplace layout as important noise-control measures.[3] An enclosure is part of the overall approach; it should not conceal a fault that needs repair.

Design noise control around normal operation

For continuously running equipment, the enclosure structure, ventilation, cooling and operating space should be planned together. If heat cannot be removed after construction, temporary panel removal or open passages may become necessary to keep the machine running, changing the conditions on which the noise-control design depended.

In Controlling noise at work, HSE warns that enclosing machinery can raise the air temperature inside. It calls for adequate ventilation and cooling, with acoustic treatment of cooling ducts and passages for materials and services.[4] This engineering principle helps when reviewing a proposal; it is not an acceptance limit for a project in China.

At the planning stage, the equipment supplier should confirm the permitted operating environment, heat-removal needs and air supply and exhaust requirements. Acoustic and building-services designers can then coordinate those conditions. Essential operating conditions should not be changed merely to make the room quieter, and untreated ventilation openings should not be left for resolution after construction.

Plan for maintenance from the beginning

A usable enclosure needs clear arrangements for routine checks and scheduled servicing. Can frequently inspected parts be seen directly? How much space is needed to replace a large component? How will the enclosure and its seals be restored after dismantling? These points belong in the drawings and handover instructions rather than being improvised on site.

If the machine changes, auxiliary equipment is added, or the operating cycle changes, the suitability of the arrangement should be reviewed. Results obtained for the original equipment conditions are not a promise for a different setup.

Verify the complete installation in operation

Acceptance should be planned around representative operating conditions agreed by both parties, with the equipment load, ventilation state and measurement positions recorded. The customer needs more than a wall-material specification: the relevant questions are whether noise at the agreed positions meets the project objective during normal operation and whether operating and maintenance access has been retained.

Before construction, prepare three sets of information: equipment operating and cooling requirements; the site layout and routes used by staff; and the noise-control objectives with the proposed verification method. These turn an enclosure quotation into a complete solution that can be discussed, compared and implemented.

Sources
[1] Tianjin Lessent Technology Co., Ltd.: About Lessent. Used only to describe the company’s business scope.
https://www.lessent.com/about
[2] Tianjin Lessent Technology Co., Ltd.: Acoustic Laboratory Solutions, noise-control section. Used only to describe the company’s business scope.
https://www.lessent.com/labs
[3] HSE: How do I reduce noise?, updated 6 March 2025.
https://www.hse.gov.uk/noise/reducenoise.htm
[4] HSE: Controlling noise at work, L108, third edition (2021), Part 3, “Enclosure”, paragraphs 204–205. Only engineering principles are referenced; UK regulations are not used to establish compliance for a Chinese project.
https://www.hse.gov.uk/pubns/priced/l108.pdf