unit loudness

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• loudness — See loudly. * * * ▪ acoustics       in acoustics, attribute of sound that determines the intensity of auditory sensation produced. The loudness of sound as perceived by human ears is roughly proportional to the logarithm of sound intensity: when… …   Universalium

• Equal-loudness contour — An equal loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. The unit of measurement for loudness levels is the phon, and …   Wikipedia

• Sound unit — A sound unit is any acoustic unit of sound measurement.*bel, B a logarithmic unit of sound pressure equal, measured a tenth of it in decibels dB.*dB, decibel a logarithmic unit of sound pressure; 20 times the logarithm of the ratio of the sound… …   Wikipedia

• Prosodic unit — Minor (foot) break Major (intonation) break | ‖ IPA number …   Wikipedia

• Sound pressure — Sound measurements Sound pressure p, SPL Particle velocity v, SVL Particle displacement ξ Sound intensity I, SIL Sound power Pac Sound power level SWL Sound energy Sound energy d …   Wikipedia

• sone — unit of loudness on a scale based on subjective or perceived loudness Units of Measurement …   Phrontistery dictionary

• decibel (dB) — Unit for measuring the relative intensities of sounds or the relative amounts of acoustic or electric power. Because it requires about a tenfold increase in power for a sound to register twice as loud to the human ear, a logarithmic scale is… …   Universalium

• phon — unit of loudness of sound as heard by listeners Units of Measurement …   Phrontistery dictionary

• sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …   Universalium

• Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …   Universalium

• Dynamic range compression — This article is about a process that intentionally reduces the dynamic range of audio signals. For similar reductions caused by circuit imperfections, see Gain compression. For processes that reduce the size of digital audio files, see Audio… …   Wikipedia