How do airflow and acoustic performance interact in louvre design?

In acoustic louvre design, airflow performance and acoustic attenuation are closely linked—and often in direct tension. Improving one characteristic can influence the other, so achieving the right balance is critical.

To increase acoustic attenuation and overall noise reduction, louvre systems typically use deeper blades, denser acoustic infill materials, and longer airflow paths. These features allow more sound energy to be absorbed as it passes through the louvre. However, increasing blade depth and internal complexity can also increase pressure drop and reduce free area, making it harder for air to pass through efficiently.

Conversely, maximising airflow performance generally requires higher free area, shorter airflow paths, and reduced internal resistance. While this improves ventilation efficiency, it can reduce the amount of acoustic absorption achievable within the same footprint.

This relationship means that acoustic louvre systems must always be designed around the specific project requirements. For example:

• A data centre or generator enclosure may prioritise noise control and accept a higher pressure drop.
• A ventilation intake serving large air volumes may prioritise airflow efficiency, with acoustic performance designed to meet—but not exceed—planning limits.

At Solinear, our SoundEX acoustic louvre systems are engineered to provide predictable acoustic attenuation while maintaining appropriate airflow performance. We work closely with acoustic consultants and M&E designers to evaluate required insertion loss, acceptable pressure drops, and plant duty to ensure the selected system achieves the necessary balance without over-specification.