About Sound Absorption
Pontus Thorsson has a Ph.D in acoustics and tests all
of ZilenZio’s screens at Akustiverkstaden (The Acoustic
Workshop). Generally speaking the more absorbent the surface,
the quicker ambient sound levels will fall. This is also
affected by the furnishings of a space and where people are
situated. You need to have an overall picture of each situation.
It is also important to remember that different types
of job have varying needs. “It is the sound level you should
consider. Certain tasks require a higher degree of privacy.
Others function fine with higher levels of noise. For example,
you cannot compare the sound environment of a library to
that of, say, a publishers,” notes Thorsson.
He continues to point out how important it is to work in a
controlled manner and comply with international regulations.
Measurements must be relevant and comparable; so are
normally taken in dB (A). A normal conversation is around
60-70 dB (A), while the level of a classroom may lie around
75-80 dB (A) or more. This is the limit of what is acceptable
as set out by the Working Environment Authority. The noise
level should not exceed an average of 85 dB (A) during the
course of a working day. As Thorsson points out, high noise
levels have an adverse effect on us. “Our moods are affected
as are levels of stress. A room with unbalanced noise can
have serious consequences.