Materials and their placement in wall building designs will have a large impact on the noise levels, or acoustics in an urban environment. Those materials with multiple layers have a greater ability to absorb, deflect and detract sound waves produced by various urban objects and activities.

Research has proven that the leaves of plants attenuate sound by reflecting, refracting and absorbing acoustic energy in small amounts. Terra Living Wall systems incorporates a various number of plants in their designs. The amount of noise reduction is proportional to the number of plants that are present in a Terra Living Wall. Terra Living Walls contain such a large number of plants that the acoustics of a room can be substantially improved.

The way Terra Living Wall systems are designed will block high frequency sound and low frequency noises to some extent. The factors which will influence noise reduction are the plant type, the plant density and the depth of the soil.

Terra Living Walls not only insulate against noise, but also vibrations and reduce sound penetration. In addition, they help to absorb the echoes bouncing off of buildings and diminish the noise pollution of the surrounding environment.