Plants, soil, and air trapped in the soil and between leaves are acoustic insulators. Vertical gardens dampen and reduce noise, which is of great benefit to building occupants affected by traffic, trains, industry, airports or mechanical equipment.
In rooms with hard-floors and ceilings, living walls increase sound absorption. A reduction in sound reflection allows for a more comfortable ambient noise level.
To optimize noise reduction, increase the surface area of the living wall through billowing or upright large-leaved plants.