Page 121 - Biomimetics: Technology Imitates Nature

Harun Yahya

Since the pressure of the waves is about one thousandth of atmos-
pheric pressure or less, they're referred to as tunnel micro-pressure waves,
which form as shown in the diagram.
The very disturbing noise created under the influence of the pressure
waves can be reduced by widening the tunnel, but the task of altering the
cross-sectional area of tunnels is very difficult and expensive.
At first, engineers thought that reducing the cross-sectional area of
trains and making the forefront shape sharp and smooth might be
a solution. They put these ideas into action in an experi-
mental train, but remained unable to eliminate
the micro-pressure waves it created.
Wondering if similar dy-
namics arose in nature, the de-
signers and engineers thought of
the kingfisher. In order to hunt its
prey, the kingfisher dives into water,
which has greater fluid resistance
than air, and it experiences sudden

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