Quietness -

It acts as a public good, promoting mental and physical health by mitigating the adverse effects of noise, such as sleep disturbance, cardiovascular disease, and stress.

(noise level) with NDSI (Normalized Difference Soundscape Index), measuring the ratio of natural sounds to human-made noise. quietness

Traditionally, quiet areas were identified solely by noise levels (e.g., Ldencap L sub d e n end-sub It acts as a public good, promoting mental

Noise from road traffic, rail, and aviation is a major pollutant. Strategies include quiet delivery schemes, urban planning buffers, and reduced noise transportation. 4. Key Recommendations QNS Index (Quietness + Naturalness): This index combines

Researchers are proposing the use of the CUQI , a new metric that measures urban soundscapes based on both acoustic intensity and context rather than just noise pollution, creating a better understanding of environmental quality. QNS Index (Quietness + Naturalness): This index combines Leqcap L sub e q end-sub

Quietness is defined both as the absence of noise (lacking high-intensity sound) and the presence of desirable, natural sounds.

This report draft examines as a crucial urban, environmental, and psychological resource, particularly in the context of increasing noise pollution in urban areas. Draft Report: The Role and Assessment of Quietness (2026) 1. Executive Summary