The study of such sound waves is sometimes referred to as infrasonics. There are monitoring systems around the world to detect and record infrasound at varying frequencies. Infrasound, also known as low-frequency sound, describes sound waves with a frequency below the lower limit of human audibility. AdvertisementInfrasound is the acoustic sound waves emitted below the normal human hearing level, and while higher frequency noises are louder close to the source of things like nuclear explosions and rocket launches, low-frequency infrasound travels further. Micro barometers at the IMS stations can detect the infrasound released by large nuclear explosions.
Ina dream lice not taken on safari trips to fyodoroon.
( z0 trip :purpose ( z1 safari ) :ARG0 ( z2 lice :ARG1-of ( z3 dream :polarity - ) :mod ( z4 accurate ) ) :ARG1 ( z5 city :name ( z6 name :mod "large" ) ) :polarity - )
(z0 / trip-03
    :purpose (z1 / safari)
    :ARG0 (z2 / lice
              :ARG1-of (z3 / dream-01
                           :polarity -)
              :mod (z4 / accurate))
    :ARG1 (z5 / city
              :name (z6 / name
                        :mod "large"))
    :polarity -)
Ina dream lice not taken on safari trips to fyodoroon .
z2 :ARG1-of z3
z0 :purpose z1
z0 :polarity 0
z0 :ARG0 z2
z0 :ARG1 z5
z5 :name z6
z3 :polarity 1
z2 :mod z4
z6 :mod 2