What is the term used for the persistence of sound in a large hall due to repeated reflections from walls and other surfaces?

Correct option is A

Correct answer: (a) Reverberation

Explanation:

• Reverberation refers to the prolongation of sound in a space due to the repeated reflections of sound waves from walls, ceilings, floors, and other surfaces.
• It occurs after the original sound source has stopped, causing a lingering effect or echo-like quality.
• Reverberation is common in large halls, auditoriums, and empty rooms where sound reflects multiple times before fading away.

Information Booster:

• Ideal reverberation time is essential for clear sound quality in places like theatres, lecture halls, and recording studios.
• It is controlled using materials like:
• Acoustic panels
• Curtains
• Carpets and padded seats
• Too much reverberation causes echoes, making speech unclear, while too little makes the space acoustically “dead.”

Additional Knowledge:

• (b) Diffraction – Bending of waves around obstacles or through openings.
• (c) Refraction – Change in direction of waves when passing through different media.
• (d) Interference – When two sound waves superimpose to form a resultant wave.