Metal sculptures in open plazas do more than serve as visual focal points—they actively interact with sound, shaping the acoustic environment in unexpected ways. The hard, reflective surfaces of metal sculptures can redirect sound waves, creating echoes or amplifying specific frequencies depending on their shape and placement. Large, curved sculptures often act as parabolic reflectors, focusing sound toward certain areas while leaving others quieter. Conversely, perforated or textured metal pieces may diffuse sound, reducing harsh reverberations.

The positioning of sculptures relative to buildings and walkways also plays a role. Clustered installations can create "acoustic shadows," while linear arrangements might channel noise like an urban canyon. Some artists intentionally design sculptures to produce harmonic resonances when wind passes through them, adding a dynamic auditory layer to public spaces.

Modern plaza designs increasingly consider these acoustic effects, blending aesthetics with functional soundscaping. By manipulating reflections and absorptions, metal sculptures transform open plazas into immersive sensory experiences where art literally shapes how we hear our surroundings.