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Psychoacoustics is the branch of psychophysics involving the scientific study of the perception of sound by the human auditory system.It is the branch of science studying the psychological responses associated with sound including noise, speech, and music.
The tools used to collect such information are called psychophysical methods. Through these, the perception of a physical stimulus (sound) and our psychological response to the sound is measured. [9] Several psychophysical methods can measure absolute threshold. These vary, but certain aspects are identical.
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 a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]
The perception of loudness is related to sound pressure level (SPL), frequency content and duration of a sound. [2] The relationship between SPL and loudness of a single tone can be approximated by Stevens's power law in which SPL has an exponent of 0.67.
dB(A), a sound level unit in which different frequencies are weighted differently to account for the perception of the human ear; Design basis accident, scenario in nuclear facilities; Dibenzylideneacetone, an organic compound used as a sunscreen; Double Bass Array, active absorption approach for low frequency sound reproduction
The pressure at which sound becomes painful for a listener is the pain threshold pressure for that person at that time. The threshold pressure for sound varies with frequency and can be age-dependent. People who have been exposed to more noise/music usually have a higher threshold pressure. [3] Threshold shift can also cause threshold pressure ...
The neural encoding of sound is the representation of auditory sensation and perception in the nervous system. [1] The complexities of contemporary neuroscience are continually redefined. Thus what is known of the auditory system has been continually changing.
The ear's shape also allows the sound to be heard more accurately. Many breeds often have upright and curved ears, which direct and amplify sounds. As dogs hear higher frequency sounds than humans, they have a different acoustic perception of the world. [24] Sounds that seem loud to humans often emit high-frequency tones that can scare away dogs.