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Noise health effects are the physical and psychological health consequences of regular exposure to consistent elevated sound levels. Noise from traffic, in particular, is considered by the World Health Organization to be one of the worst environmental stressors for humans, second only to air pollution. [2]
Noise pollution, or sound pollution, is the propagation of noise or sound with potential harmful effects on humans and animals. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems.
Within this context, environmental noise is generally present in some form in all areas of human, animal, or environmental activity. The effects in humans of exposure to environmental noise may vary from emotional to physiological and psychological. [2] Noise at low levels is not necessarily harmful.
These factors may diminish well-being of people that suffer from sound annoyance. Other factors that correlate with sound annoyance are increased absence form work, [3] sleep disturbance, [3] and interference with performing cognitive tasks like paying attention at school. [3] For a more detailed article about health effects: health effects ...
The risk of negative health effects from sound exposures (be it noise or music) is primarily determined by the intensity of the sound , duration of the event, and frequency of that exposure. [9] These three factors characterize the overall sound energy level that reaches a person's ears and can be used to calculate a noise dose.
This "protective effect" had long been thought to involve the active mechanisms of the outer hair cells and the efferent system commanding them. [80] The contractile effect of the outer hair cells, activated by the efferent nervous system has been proven to provide a protective effect against acoustic trauma. [119] Cross-section of the cochlea.
Either type of environment may result in noise health effects if the sound intensity and exposure time is too great. In the case of industrial equipment, the most common techniques for noise protection of workers consist of shock mounting source equipment, creation of acrylic glass or other solid barriers, and provision of ear protection ...
Hyperacusis is an increased sensitivity to sound and a low tolerance for environmental noise. Definitions of hyperacusis can vary significantly; it often revolves around damage to or dysfunction of the stapes bone , stapedius muscle or tensor tympani ( eardrum ).