When designing an outdoor space with acoustics in mind, the choice of furniture plays a crucial role in sound reflection and absorption. Hard, dense materials like teak, metal, or stone are ideal for directing sound, as they reflect rather than absorb audio waves. Wooden benches, metal chairs, and stone tables can enhance acoustics in gardens or patios, especially when arranged in a semi-circle or around a focal point. Avoid soft, porous materials like cushions or wicker, which dampen sound. For optimal results, combine furniture with strategic placement and natural elements like water features or hedges to create a balanced acoustic environment.