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An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz.
Logarithmic chart of the hearing ranges of some animals [1] [2] Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high ...
A number of instruments have been invented, designed, and made, that make sound from matter in its liquid state. This class of instruments is called hydraulophones . Hydraulophones use an incompressible fluid, such as water, as the initial sound-producing medium, and they may also use the hydraulic fluid as a user-interface.
The terms sounding range, written range, designated range, duration range and dynamic range have specific meanings.. The sounding range [3] refers to the pitches produced by an instrument, while the written range [3] refers to the compass (span) of notes written in the sheet music, where the part is sometimes transposed for convenience.
The fourth harmonic vibrates at four times the frequency of the fundamental and sounds a perfect fourth above the third harmonic (two octaves above the fundamental). Double the harmonic number means double the frequency (which sounds an octave higher). An illustration in musical notation of the harmonic series (on C) up to the 20th harmonic.
The Cristal Baschet uses friction of wet fingertips on glass bars to produce sound. pitched percussion: Electrocardiophone: Electrophone: 53: quintephone: The electrocardiophone is an experimental musical instrument and diagnostic tool which uses heart rhythms to generate or modulate sounds through a synthesizer. Electroencephalophone ...
Audiogram. An audiogram is a graph that shows the audible threshold for standardized frequencies as measured by an audiometer.The Y axis represents intensity measured in decibels (dB) and the X axis represents frequency measured in hertz (Hz). [1]
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...