How can you reduce noise?

You answered correctly. Using higher gears such as 4th or 5th in built-up areas helps reduce engine revolutions, which in turn lowers noise levels. Driving at high engine revolutions or high speed increases noise, so those should be avoided if you wish to drive quietly, especially in residential or built-up areas. In general, smooth and moderate driving with lower engine speeds is important for reducing noise pollution. This not only helps maintain a peaceful environment but also demonstrates consideration for residents and other road users.