## 3aNS13. ``Medium-weighted dose'' (MWD) of noise as method of estimation of long protracted noise.

### Session: Wednesday Morning, December 4

### Time: 11:45

**Author: Alexander A. Menshov**

**Location: 1132 Capuchino Ave., #2, Burlingame, CA 94010**

**Abstract:**

For the estimation of A-weighted occupational noise level in several
countries (Russia, Ukraine, and so on) use of dose of noise yields a single
number and allows one to demonstrate the excess above the sanitary standard.
Onedose is equal to the value of the standard level at work: -80, at rest: -40,
and at sleep: -30 dBA. Increasing the level of noise by 3 dBA will increase one
dose by a factor of 2 (two doses), at 6 dBA the increase is by four times (four
doses), and so on. The principle of the dose approach spread to community noise.
This allows one to estimate community noise after work in another two periods of
24 h of rest (8 h) and sleep (8 h). It was proposed to estimate a consistent
occupational and community noise by a ``medium-weighted dose'' (MWD) of noise
during one day (24 h) [A. Menshov, J. Acoust. Soc. Am. 96, 3274(A) (1994)]. This
method may be used for estimating long protracted noise during a week, month, or
year. The sum for a MWD of noise is computed according to each day (24 h) of the
week, each week of the month, and each month of the year divided by the total
time. The quantity of MWD of noise for each week, month, or year takes into
account the absence of the occupational noise on holidays and on vacations. The
calculation of MWD of noise over a complete year is very important for
agriculture.

ASA 132nd meeting - Hawaii, December 1996