Infrasound, sometimes referred to as low frequency sound, describes sound waves with a frequency below the lower limit of human audibility (generally 20...

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...

ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges. Sound is defined...

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...

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...

increase intelligibility by condensing them and raising the frequency from infrasound to a more audible and reproducible range. The following unidentified sounds...

a newly-installed extractor fan, found by Tandy, that was generating infrasound of 18.9 Hz, 0.3 Hz, and 9 Hz. A long-range acoustic device (LRAD) produces...

detect a nuclear detonation, these include seismic, hydroacoustic, and infrasound detection, air sampling, and satellites. They have their own weaknesses...

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...