RT null
T1 Frontiers 2022 Report: Emerging Issues of Environmental Concern - Chapter 1
A1 United Nations Environment Programme, 
A2 Aletta, Francesco
K1 noise pollution
K1 noise control
K1 environmental health
K1 sound emission
K1 noise
SN 978-92-807-3917-6
YR 2022
FD 2022-02
LK https://wedocs.unep.org/handle/20.500.11822/38060
UL https://wedocs.unep.org/handle/20.500.11822/38060
NO Sounds are complex physical phenomena originating in the vibration from a source that propagates energy into a medium as an acoustic wave. Sounds happen continuously and are everywhere: there is no such thing as 'silence' on the planet. As physical phenomena, sounds are neither positive nor negative. They acquire meaning and produce an effect only when considered from the perspective of a listener. When sounds are unwanted, they become noise. When noises are too loud and persist too long, they become noise pollution.Full report is available at: https://wedocs.unep.org/handle/20.500.11822/38059
DS UN Environment Document Repository
RD Sep 18, 2026