Intelligibility (communication) - Noise Levels

Noise Levels

For satiable communication, the average speech level should exceed that of an interfering noise by 6dB; lower sound:noise ratios are rarely acceptable (Moore, 1997). Manifesting in a wide frequency range, speech is quite resistant to many types of masking frequency cut-off—Moore reports, for example, that a band of frequencies from 1000 Hz to 2000 Hz is sufficient (sentence articulation score of about 90%).

Quantity to be measured Unit of measurement Good values
STI Intelligibility (international known) > 0.6
CIS Intelligibility (international known) > 0.78
%Alcons Articulation loss (popular in USA) < 10%
C50 Clarity index (widespread in Germany) > 3 dB
RASTI (obsolete) Intelligibility (international known) > 0.6

Word articulation remains high even when only 1–2% of the wave is unaffected by distortion:

Read more about this topic:  Intelligibility (communication)

Other articles related to "noise, noise levels, level":

Health Effects From Noise - Cardiovascular Effects
... Noise has been associated with important cardiovascular health problems ... evidence showed 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 ...
Astronautical Hygiene - Humans in Space - Noise
... on the International Space Station (ISS) all generate considerable noise ... As more equipment is required on the space station, then more noise will be generated ... has never given a high priority to the noise levels experienced by its cosmonauts (e.g ...
Environmental Impact Of Aviation In The United Kingdom - Environmental Impact - Local Environmental Impact
... redress to 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 ...
Noise Dosimeter - Measuring Industrial Noise
... Basically, 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 ...

Famous quotes containing the words levels and/or noise:

    The only inequalities that matter begin in the mind. It is not income levels but differences in mental equipment that keep people apart, breed feelings of inferiority.
    Jacquetta Hawkes (b. 1910)

    You may say a cat uses good grammar. Well, a cat does—but you let a cat get excited once; you let a cat get to pulling fur with another cat on a shed, nights, and you’ll hear grammar that will give you the lockjaw. Ignorant people think it’s the noise which fighting cats make that is so aggravating, but it ain’t so; it’s the sickening grammar they use.
    Mark Twain [Samuel Langhorne Clemens] (1835–1910)