The second dimension of Noise Monitoring Services segmentation is application, which maps acoustic measurement to end‑user objectives. In the industrial application, continuous monitoring safeguards worker health, ensures compliance with occupational safety standards, and optimizes machinery maintenance; it commands the largest share, roughly 35 % of total market revenue, due to the high density of noise sources. Transportation applications—railway yards, highways, and ports—focus on community impact assessments and regulatory limits, contributing about 25 % of the market. The construction sector relies on short‑term, high‑precision monitoring to control site‑level exposure and to verify mitigation measures, representing close to 20 % of the market. Urban planning uses noise maps and predictive modeling to shape zoning decisions and public‑space design, a niche that accounts for approximately 10 % of revenue. Finally, environmental compliance services, including wildlife protection and legal dispute support, occupy the remaining 10 % of the market. This application‑focused Noise Monitoring Services segmentation clarifies how distinct user needs collectively shape the market’s size and growth trajectory.