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Infrasound,
sometimes referred to as low
frequency sound or
incorrectly subsonic (subsonic
being a
descriptor for "less than the
speed of sound"), describes...
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Infrasound is
sound at
frequencies lower than the low
frequency end of
human hearing threshold at 20 Hz. It is known, however, that
humans can perceive...
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ultrasound and are not
audible to humans.
Sound waves below 20 Hz are
known as
infrasound.
Different animal species have
varying hearing ranges,
allowing some to...
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including animal attacks, hypothermia, an avalanche,
katabatic winds,
infrasound-induced panic,
military involvement, or some
combination of
these factors...
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increase intelligibility by
condensing them and
raising the
frequency from
infrasound to a more
audible and
reproducible range. The
following previously unidentified...
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detect a
nuclear detonation,
these include seismic, hydroacoustic, and
infrasound detection, air sampling, and satellites. They have
their own weaknesses...
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yield of 400–500
kilotonnes of TNT (1.7–2.1 petajoules),
estimated from
infrasound and
seismic measurements. This was
approximately 30
times as much energy...
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addition to the
detection signaling circuit. The
infrasound detector works by
detecting infrasound, or
sound waves at
frequencies below 20 Hz. Sounds...
- the pitch, as in the low-pitched
roars of big cats. The
production of
infrasound is
possible in some
mammals such as the
African elephant (Loxodonta spp...
- engineer. He was
known best for his
research into the
relationship between infrasound and
ghostly apparitions.
During 2001
Tandy was
asked to
investigate the...
