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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...
-
Sound waves below 20 Hz are
known as
infrasound.
Different animal species have
varying hearing ranges,
allowing some to even hear ultrasounds.
Sound is...
-
raising the
frequency from
infrasound to a more
audible and
reproducible range. The
following previously unidentified sounds have been
detected by the...
- was
generating infrasound of 18.9 Hz, 0.3 Hz, and 9 Hz. A long-range
acoustic device (LRAD)
produces a 30
degree cone of
audible sound in frequencies...
-
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...
-
including animal attacks, hypothermia, an avalanche,
katabatic winds,
infrasound-induced panic,
military involvement, or some
combination of
these factors...
- engineer. He was
known best for his
research into the
relationship between infrasound and
ghostly apparitions.
During 2001
Tandy was
asked to
investigate the...
- also
mentioned the
possible need for
hearing protection.
Directional sound Infrasound U.S.
patent 6,778,672
filed on 17
August 2004
describes an HSS system...
-
bellows of male
American alligators are
accompanied by
powerful blasts of
infrasound.
Another form of male
display is a loud head-slap. In 2010, on spring...
-
genre conventions. In a
study by
Medes et al.,
prolonged exposure to
infrasound and low-frequency
noise (<500 Hz) in long
durations has an
effect on vocal...
