Which term describes sound persistence due to reflections in a room?

• A. Reverberation.
• B. Reflection.
• C. Diffraction.
• D. Refraction.

Answer: (A)

Reverberation is the lingering of sound caused by many reflections bouncing around a room. When you speak or play music, the sound doesn’t stop at the moment you stop; the energy keeps arriving at your ears from multiple surfaces, creating a continuous tail of sound. This persistence is different from a single reflection, which would be heard as a distinct echo if the delay is long enough. Diffraction involves bending around obstacles, not the sustained tail from room reflections. Refraction involves a change in speed and direction as sound moves through different media, not the lingering effect inside a room. In everyday spaces, the overlapping reflections produce a reverberant sound rather than discrete echoes, and acousticians sometimes describe reverberation by how long the sound decays in the space.