OUTDOOR NOISE BARRIER

Client: Bermudez Biscuits Limited
Issue: Noisy rooftop chiller unit disturbing neighbouring residences
Solution: Echo Barrier – Outdoor Noise Blocking Panels

Issue

Bermudez Biscuits Limited experienced noise complaints related to a rooftop-mounted chiller unit located adjacent to a residential area. During night-time operation, the continuous mechanical noise from the unit was disturbing nearby occupants and creating a compliance and community-impact concern that required mitigation.

What Was Happening

The chiller unit produced sustained sound pressure levels estimated between 75–80 dBA at the affected boundary. Without any form of acoustic screening, the noise propagated directly toward neighbouring homes. At night, when ambient noise levels are lower, the chiller noise became particularly noticeable and intrusive.

Constraints

The solution needed to reduce noise levels to within acceptable night-time residential limits while remaining cost-effective and suitable for long-term outdoor use. The chiller unit was mounted on an elevated platform, limiting structural modification options and requiring a system that would not interfere with airflow, maintenance access, or equipment operation.

BEXtronics’ Approach

Rather than attempting to modify or enclose the chiller itself, the mitigation strategy focused on controlling noise propagation. The goal was to interrupt the direct line-of-sight between the noise source and neighbouring residences using a purpose-designed outdoor noise barrier system that could be installed quickly and efficiently.

Solution Implemented

Echo Barrier outdoor noise blocking panels were installed in an L-shaped configuration around the chiller unit, mounted onto chain-link fencing to form an effective acoustic screen. This arrangement reduced direct sound transmission while maintaining adequate ventilation and access. The panels were selected for their durability, weather resistance, and suitability for long-term outdoor industrial environments.

Outcome

Post-installation measurements showed noise levels reduced to approximately 60–65 dBA at the affected boundary, bringing the site within acceptable night-time residential limits. While decibel reduction is logarithmic rather than linear, the reduction achieved was clearly perceptible and significantly improved conditions for neighbouring residents. The installation was completed quickly and without disruption to plant operations, resolving the noise complaint and restoring compliance.