subjective 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

• Loudness — is the quality of a sound that is the primary psychological correlate of physical strength (amplitude).Loudness, a subjective measure, is often confused with objective measures of sound pressure such as decibels or sound intensity. Filters such… …   Wikipedia

• Subjective constancy — or perceptual constancy is the perception of an object or quality as constant under changing conditions.VisionIn vision this means perceiving a color as constant under changing conditions of illumination harv|Erickson|1975|pp=11 12 and is the… …   Wikipedia

• 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

• Psychoacoustics — is the study of subjective human perception of sounds. Alternatively it can be described as the study of the psychological correlates of the physical parameters of acoustics. Background Hearing is not a purely mechanical phenomenon of wave… …   Wikipedia

• Weighting filter — A weighting filter is used to emphasise or suppress some aspects of a phenomenon compared to others, for measurement or other purposes. Contents 1 Audio application …   Wikipedia

• ACOUSTIQUE - Audiométrie — Il est facile de constater que la sensation sonore dépend des caractéristiques physiques des sons et des bruits. Un son trop faible n’est pas perçu. Un son trop fort provoque une gêne, voire une douleur. Il existe donc des limites d’intensité du… …   Encyclopédie Universelle

• A-weighting — A graph of the A , B , C and D weightings across the frequency range 10 Hz – 20 kHz Video illustrating A weighting by analyzing a sine sweep (contains audio) A weighting is the most …   Wikipedia

• phon — A unit of loudness of sound. * * * phon fän n the unit of loudness on a scale beginning at zero for the faintest audible sound and corresponding to the decibel scale of sound intensity with the number of phons of a given sound being equal to the… …   Medical dictionary

• Programme level — refers to the level that an audio source is transmitted or recorded at, and is important in audio if listeners to CD s, radio and television are to get the best experience, without excessive noise in quiet periods or compression of loud sounds.… …   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