Even low levels of traffic noise can negate the benefits of listening to natural sounds, researchers say Hearing the trill or whistle of a bird while going about daily life is well known to boost people’s mood. But a new study suggests the psychological benefits of hearing birdsong are being thr...
Source: [Guardian Environment](https://www.theguardian.com/environment/2026/aug/26/mood-boosting-benefits-of-birdsong-drowned-out-by-traffic-noise-study-finds)