Infrasound
Videos
Infrasound, sometimes referred to as low frequency sound or subsonic, describes sound waves with a frequency below the lower limit of human audibility. Hearing becomes gradually less sensitive as freq
Infrasound arrays at a monitoring station in Qaanaaq, Greenland
Patent for a double bass reflex loudspeaker enclosure design intended to produce infrasonic frequencies ranging from 5 to 25 hertz, of which traditional subwoofer designs are not readily capable
Sonic weapon
Videos
Sonic and ultrasonic weapons are directed-energy weapons of various types that use sound to injure or incapacitate an opponent. Some sonic weapons make a focused beam of sound or of ultrasound; others
Infrasound
…annoyance to the technicians who work close to a modern large-scale wind turbine". Jürgen Altmann of the Technical University of Dortmund, an expert on sonic weapons, has said that there is no reliable evidence for nausea and vomiting caused by infrasound. High volume levels at concerts from subwoofer arrays have…
A long-range acoustic device (LRAD) in use on the USS Blue Ridge
An NYPD officer stands ready with the LRAD 500X at an Occupy Wall Street protest on November 17, 2011 near the city hall.