infrasonic


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infrasonic

[¦in·frə¦sän·ik]
(acoustics)
Pertaining to signals, equipment, or phenomena involving frequencies below the range of human hearing, hence below about 15 hertz. Also known as subsonic (deprecated usage).

infrasonic

Sounds that are below the audible hearing range; typically below 10 or 20 Hz. Contrast with ultrasonic.
References in periodicals archive ?
Effects of low frequency and infrasonic noise on man.
One remaining possibility was that the infrasonic frequency could be excited artificially by striking a drum at the correct rhythm.
Sounds that are too low for humans to hear are called infrasonic sounds.
She guessed that the elephants relied upon these infrasonic calls for long-range communication.
ASHEBORO, North Carolina: A new study has found that giraffes, long thought to be silent creatures, are babbling away at an infrasonic level inaudible to humans.
TABLE 8 APPLICATIONS FOR INFRASONIC DETECTION SYSTEMS 32
The three volcanologists will install infrasonic microphones in three different locations to detect the volcano's activity even under the worst weather conditions,'' Surono, the chief of the Geological Agency at Indonesia's Volcanic and Geological Disaster Mitigation Center, said Friday.
The study, led by Robin Matoza, a graduate student at Scripps Oceanography, measured infrasonic sound from Mount St.
The last horse to win after contesting a Classic was Infrasonic in 1993, and the last having contested a handicap was Silver Wedge in 1994.
The black-ash, cherry, or beech cabinet contains a 3-way design comprising two vented, nominally 9" polypro woofers powered by a 350W amp featuring a little LF EQ with savvy infrasonic highpassing; a nominally 7" mid; and the 1" tweeter (both aluminum-manganese).
They also make infrasonic calls that are too low for humans to hear.