Solution: Echo Barrier – Outdoor Noise Barrier System
The Diego Martin Public Library received complaints from nearby residential properties regarding noise generated by its outdoor air-conditioning compressor units. While the equipment was operating normally, the airborne mechanical noise was travelling beyond the property boundary and creating community impact concerns that required mitigation.
The compressors were mounted on elevated exterior platforms along the side of the building in an open-air environment. Initial boundary measurements indicated operational sound levels averaging approximately 67 dBA. With no acoustic screening in place, noise propagated directly toward neighbouring properties. In lower ambient conditions, the mechanical hum became clearly perceptible and intrusive.
The solution needed to reduce environmental noise levels without compromising airflow, servicing access, or equipment performance. The compressors were essential to building operation and could not be relocated or fully enclosed. Any mitigation system had to be structurally secure, suitable for long-term outdoor exposure, and compatible with the existing platform configuration.
Rather than attempting to modify the mechanical equipment itself, the mitigation strategy focused on controlling airborne noise transmission. The objective was to interrupt primary sound paths toward sensitive receptors while preserving ventilation and access. A perimeter barrier system was selected to create an effective acoustic screen without imposing load on the compressors or altering system function.
A custom steel framing structure was fabricated and mounted to the existing safety railings surrounding the compressor platforms. Chain-link fencing was integrated into the frame to provide a stable mounting surface. Echo Barrier outdoor noise panels were then installed to form an acoustic enclosure along the exposed sides of the platforms.
The configuration was designed to attenuate direct line-of-sight noise transmission while maintaining open airflow above and around the equipment. Materials were selected for durability, weather resistance, and long-term performance in outdoor conditions.
Post-installation sound measurements taken at the property boundary recorded average operational levels of approximately 58 dBA, reflecting a reduction of roughly 10 dBA. In acoustic terms, this represents a significant reduction in noise energy and a clearly perceptible improvement in environmental conditions for neighbouring residents.
The installation was completed efficiently and without disruption to building operations, successfully mitigating the noise impact while preserving mechanical performance and access.
We focus on structured design, proper commissioning, and lifecycle support rather than low-cost, package-based installations.
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