The most effective control measure for reducing noise impact is __________.

• A. Land Acquisition
• B. Sound Insulation
• C. Operational Restrictions
• D. Flight Path Modification

Answer: (A)

Removing people and structures from the noisy area through land acquisition delivers the most effective and permanent reduction in noise impact because it eliminates exposure entirely. When receptors are relocated or the buildings are removed from the noise footprint, there’s no ongoing nuisance to manage, no indoor or outdoor exposure to mitigate, and no reliance on ongoing actions by residents or operators. This approach provides certainty and long-term relief, which is why it outperforms other measures.

Sound insulation helps inside buildings but doesn’t remove outdoor exposure and still requires maintenance and funding over time. Operational restrictions can cut noise during certain times or activities but don’t guarantee reductions for all receptors and can disrupt operations. Flight path modification may reduce noise for some areas but can simply shift the problem to other locations and involves complex coordination and feasibility constraints.