helivajadusi
Helivajadusi refers to the phenomenon of helicopter-induced noise pollution, particularly in urban and residential areas near helicopter landing sites or flight paths. The term originates from the Finnish language, combining *heli* (helicopter) and *vajaus* (noise or disturbance). This issue has gained attention in cities where helicopter services, such as medical air ambulances, private charters, or police operations, operate frequently.
The primary source of noise in helicopters comes from their rotor blades, which generate loud, pulsating sounds
Helivajadusi is particularly problematic in densely populated areas where helicopters must land or hover near homes,
In some cases, affected communities have pushed for the relocation of helipads or the installation of sound