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- A frequency-response adjustment of a sound-level meter that makes its reading conform,
very roughly, to human response. The human ear is most
sensitive to sound at mid frequencies (500 to 4,000 Hz) and is
progressively less sensitive to sound at frequencies above and below
this range. A-weighted sound level is the most commonly used descriptor
to quantify the relative loudness of various types of sounds with
similar or differing frequency characteristics.
- A weighting methodology used to account for changes in human hearing
sensitivity as a function of frequency. The A-weighting network
de-emphasizes
the high (6.3 kHz and above) and low (below 1 kHz) frequencies, and
emphasizes the frequencies between 1 kHz and 6.3 kHz, in an effort to
simulate
the relative response of human hearing.
Source:
http://www.volpe.dot.gov/acoustics/docs/1990-1999/1999-1.pdf
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A
frequency-response adjustment of a sound-level meter that makes its reading
conform, very roughly, to human response.
Source:
http://www.owenscorning.com/around/sound/glossary.asp
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