Biomedical Engineering Reference
In-Depth Information
is increased and will indeed cause an increased hearing risk, i.e., hearing loss and
tinnitus. This argumentation will provide the implication that sound often virtu-
ally exposed in population, will provide a variety of hearing loss, i.e., a variation
in the status of hearing in a population that will have restrictions on the expected
social quality in life. Today, there is a tendency in the young generation to believe
that a certain background noise is a normal state. The normal background noise
has then no reference range, in the sense that no references have been experienced
where the background noise effects are decreased to a minimum, or even disap-
peared in a quiet room, e.g., in a sound chamber.
1.3
THE AMUSED HUMAN
All animals need from their point of accessible capability to have fun and to
curiously explore the adventured environment around them. The significance of
human behaviour is however that there seems to be a divided situation, where
a huge number of people concentrate their available time in survival activities,
i.e., to get food for the day for themselves and their families. On the other hand,
a part of the population experience their days by amusement activities, strongly
encouraged by a healthy generation of aged people. However, the aged genera-
tion is in general equipped with limited perceptual abilities at least compared to
the perception they experienced some years ago. The individual of today, with
their limited perceptual utilisation, can still make use of the perception and expe-
rience to get amusements in excess of the ordinary working day.
The human sensing system is certainly a remarkable complex device, built up
at our disposal to act as a window towards the world around us. Our sensing
process can provide us with pleasure in life. In interaction with the collected sen-
sations from the happenings, as we experience, it also makes us interfere with,
and act in the dynamical world around us. This makes the human an indepen-
dent, autonomous and interacting creature that appreciates to be an active part in
the world. But a consequence thereof is also that the window towards the human
proximity of sensing-acting around us is experienced differently by individuals,
due to many reasons, for example, age, gender or cultural origin.
We enjoy sensory impressions, like listening to the high volume of sound from
a rock concert, a vision inspired visit in a museum and the physical impression and
enjoyment of walking in the forest. The feeling of being in the centre of a thunder-
storm is an impressive adventure, the light enlightening the dark clouds, the rain
rattling on our bare skin. Being part of a thunderstorm is not only perceived by
the auditory sense, but the vibrating energy and light flashes of a thunder is per-
ceived by our whole body in addition to experiencing the rain against the skin.
This is indeed an experienced adventure that is perceived with the whole body.
However, the experience from this type of overwhelming perceptual impressions
is not a single experience, Our activities are accomplished by all possible and ac-
cessible perceptual abilities, e.g., the window towards the world is wide open that
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