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Draft (possibly from open windows and doors or air conditioning) should
not exceed 0.1 to 0.15 m/s. Draft on individual parts of the body should be
avoided.
not exceed 0.1 to 0.15 m/s. Draft on individual parts of the body should be
avoided.
An air conditioner should be individually adjustable. It should be serviced
regularly.
regularly.
The windows should be able to be opened and have sunshades to avoid
glare effects. Sunlight can increase the room temperature considerably. Sun-
shades attached to the outside of the building provide the best protection.
glare effects. Sunlight can increase the room temperature considerably. Sun-
shades attached to the outside of the building provide the best protection.
Plants can improve room conditions and are therefore recommended in all
cases. They increase the relative humidity and filter pollutants from the air.
cases. They increase the relative humidity and filter pollutants from the air.
22.1.5
Noise Levels
Noise is a physically powerful stress factor. Although it is often played down,
too much noise makes you ill. Apart from health impairments, such as defective
hearing, vegetative disorders, and psychic changes, noise affects our efficiency by
impairing our ability to concentrate. Furthermore, discontent can reduce working
motivation. The fact that proper noise abatement can possibly cost a lot of money
is also problematic.
too much noise makes you ill. Apart from health impairments, such as defective
hearing, vegetative disorders, and psychic changes, noise affects our efficiency by
impairing our ability to concentrate. Furthermore, discontent can reduce working
motivation. The fact that proper noise abatement can possibly cost a lot of money
is also problematic.
A calm working environment improves efficiency. Work at terminal workstations
is often characterized as “mental activity”. Therefore the maximum load value for
scientific work or programming is 55 dB (A). The dB (A) represent a weighted
evaluation of the acoustic pressure. The A-filter curve most resembles human
perception. An increase of the sound level by 10 dB (A) is normally perceived as a
duplication of volume.
is often characterized as “mental activity”. Therefore the maximum load value for
scientific work or programming is 55 dB (A). The dB (A) represent a weighted
evaluation of the acoustic pressure. The A-filter curve most resembles human
perception. An increase of the sound level by 10 dB (A) is normally perceived as a
duplication of volume.
Because mainly mental work is done at terminal workstations, quiet work-
ing materials should be used from the start.
ing materials should be used from the start.
The maximum limiting value for office work is 55 dB (A). With especially
high mental demands or necessary communication of language, as low as
35–45 dB (A) is required. This is the case, for instance, for specialized work,
scientific work, or programming.
high mental demands or necessary communication of language, as low as
35–45 dB (A) is required. This is the case, for instance, for specialized work,
scientific work, or programming.
Furthermore, the evaluation level of a maximum of 55 dB (A) is important.
If 70 dB (A) is measured for a quarter of an hour, the noise in the remaining
time should be less than or equal to 55 dB (A).
If 70 dB (A) is measured for a quarter of an hour, the noise in the remaining
time should be less than or equal to 55 dB (A).
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22.1. The Working Environment