In a large open plan space, which option is an absorptive material used to improve acoustics?

• A. Acoustic panels
• B. Glass partitions
• C. Concrete floor
• D. Metal ceiling tiles

Answer: (A)

When you want to improve sound in a large open space, the goal is to reduce how much sound reflects off surfaces. Sound bounces around a big room, which can make speech hard to understand and create a noisy environment. The key approach is to absorb as much of that sound energy as possible, especially mid and high frequencies that carry speech.

Acoustic panels are designed for this purpose. They are made with sound-absorbing material and are often wrapped in fabric or finished to look attractive, so they can be placed on walls or ceilings without compromising the room’s design. By absorbing sound rather than reflecting it, they shorten the reverberation time and make conversations clearer and more comfortable.

Glass partitions tend to reflect much of the sound, sometimes reducing openness but not providing much absorption unless specially treated; they’re not primarily absorptive.

A concrete floor is a hard, highly reflective surface that amplifies echoes and makes the space louder unless covered with carpets or mats, which are separate absorptive treatments rather than the surface itself.

Metal ceiling tiles are also generally reflective and can increase sound energy unless specifically designed with an absorbing core or perforations for absorption; standard metal tiles don’t serve as effective absorbers on their own.

So, the absorber chosen to improve acoustics in a large open plan space is acoustic panels.