Selecting outdoor furniture for a rooftop acoustic lab requires careful consideration of durability, soundproofing, and weather resistance. Start by choosing materials like powder-coated aluminum or teak, which withstand harsh weather while minimizing noise interference. Opt for modular designs that allow flexible arrangements without compromising acoustic performance. Cushions should use high-density foam with waterproof covers to reduce sound reflection. Avoid metal-heavy designs that may vibrate or echo. Finally, prioritize lightweight yet sturdy pieces for easy reconfiguration during experiments. By balancing functionality and acoustics, you can create an optimal outdoor research space.