Noise Pollution MCQ with answer and solution

Concept

Control of reflected noise

Step-by-step solution

1. Sound-absorbing lining of walls and ceilings reduces the reflected (reverberant) sound. 2. It does not affect the direct air-borne sound or structure-borne sound.

Explanation

Absorbent lining on room surfaces reduces reflections, so the reverberant field falls. Direct noise from the source is not reduced, and source noise and structure-borne noise are controlled by other methods.

Shortcut

Absorbing lining → reflection noise.

Common mistake

Expecting the lining to reduce direct noise.