Noise Levels

Some articles on noise levels, level, noise:

Intelligibility (communication) - Noise Levels
... For satiable communication, the average speech level should exceed that of an interfering noise by 6dB lower soundnoise ratios are rarely acceptable (Moore, 1997) ...
Environmental Impact Of Aviation In The United Kingdom - Environmental Impact - Local Environmental Impact
... those living near airports who are disturbed by noise ... Government sanctioned measurements of noise near airports take an average sound level, measured in decibels (dB), over a 16 hour day, and are expressed as an LAeq figure ... Officially, 57 dB LAeq is the threshold at which noise levels become disturbing, 63 dB LAeq represents moderate disturbance, whilst 69dB LAeq represents high disturbance ...
Astronautical Hygiene - Humans in Space - Noise
... Space Station (ISS) all generate considerable noise ... on the space station, then more noise will be generated ... The Russian space program has never given a high priority to the noise levels experienced by its cosmonauts (e.g ...
Noise Dosimeter - Measuring Industrial Noise
... there are two different instruments to measure noise exposures the sound level meter and the dosimeter ... A sound level meter is a device that measures the intensity of sound at a given moment ... Since sound level meters provide a measure of sound intensity at only one point in time, it is generally necessary to take a number of measurements at different times during the day ...
Health Effects From Noise - Cardiovascular Effects
... Noise has been associated with important cardiovascular health problems ... suggested a weak correlation between long-term noise exposure above 67-70 dB(A) and hypertension ... More recent studies have suggested that noise levels of 50 dB(A) at night may also increase the risk of myocardial infarction by chronically elevating cortisol production ...

Famous quotes containing the words levels and/or noise:

    When I turned into a parent, I experienced a real and total personality change that slowly shifted back to the “normal” me, yet has not completely vanished. I believe the two levels are now superimposed, with an additional sprinkling of mortality intimations.
    Sonia Taitz (20th century)

    Sweet bird, that shunn’st the noise of folly,
    Most musical, most melancholy!
    John Milton (1608–1674)