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Infrasound perception has been observed and quantified in the homing pigeon which has particularly good long distance navigation skills. The precise relevance of such signals for the pigeon is still unknown, but several uses for infrasound have been hypothesized, such as navigation and detection of air turbulences when flying and landing.
Infrasound wavelengths can be generated artificially through detonations and other human activity, or naturally from earthquakes, severe weather, lightning, and other sources. [73] Like forensic seismology , algorithms and other filter techniques are required to analyze gathered data and characterize events to determine if a nuclear detonation ...
Vladimir Gavreau, born Vladimir Gavronsky (1904 – 1967), [1] was a French scientist making experiments on the biological effects of infrasound. Gavreau was born in Moscow . His interest in infrasonic waves first came about in his lab during the 1960s, when he and his lab assistants experienced pain in the ear drums and shaking lab equipment ...
Lindsay's Wheel of Acoustics, which shows fields within acoustics. Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.
Microbaroms are a form of persistent low-level atmospheric infrasound, [22] generally between 0.1 and 0.5 Hz, that may be detected as coherent energy bursts or as a continuous oscillation. [11] When the plane wave arrivals from a microbarom source are analyzed from a phased array of closely spaced microbarographs, the source azimuth is found to ...
Due to the wide range of signal properties and media they propagate through, specialized equipment may be required instead of the usual microphone, such as a hydrophone (for underwater sounds), detectors of ultrasound (very high-frequency sounds) or infrasound (very low-frequency sounds), or a laser vibrometer (substrate-borne vibrational signals).
Because there were so many different sources of infrasound, methods of detecting were of interest for the military and civilians. Long distance propagation of infrasound is allowed by ground reflection and molecular attenuation. The ground acts as a reflecting service for incoming energy and molecular attenuation is zero at infrasonic frequencies.
A distinct use of the term sound from its use in physics is that in physiology and psychology, where the term refers to the subject of perception by the brain. The field of psychoacoustics is dedicated to such studies. Webster's dictionary defined sound as: "1. The sensation of hearing, that which is heard; specif.: a. Psychophysics.