Hearing

The subjective human response to sound.

Acoustic Trauma

Damage to the hearing mechanism caused by a sudden burst of intense noise, or by a blast. The term usually implies a single traumatic event.

Background Noise

The ability to hold a conversation depends on the background noise level and the distance between the people.



Phase and Time Difference

Phase in audio reproduction:

Temporal Fluctuations

It is known that the temporal resolution of the auditory system is frequency dependent (Shailer and Moore, 1983, 1987). Time constants (i.e., integration times) for the lower frequency bands are larger than those for the higher bands.

Gap Length
Frequency (Hz)Gap (ms)
10018
2009.5
4007
8006.5
10006
20006
30004.5
40004
50004
70003.9
80003.7

The gap length in ms at a characteristic frequency taken from Moore (1997)


Reference

Moore, B. C. (1997). An Introduction to the Psychology of Hearing, fourth edition, Academic Press (London).

Shailer, M. J., and Moore, B. C. (1983). "Gap detection as a function of frequency, bandwidth, and level," J.Acoust.Soc.Am. 74, 467-473.

Shailer, M. J., and Moore, B. C. (1987). "Gap detection and the auditory filter: phase effects using sinusoidal stimuli," J.Acoust.Soc.Am. 81, 1110-1117.

See also: Acoustic Source Location, Audiogram, Audiometer, Duplex Theory of Localization, Ear, Fletcher-Munson Curves, Haas Effect, Hearing Damage, Hearing Loss, Hearing Protector, Hearing Range in Animals, Hearing Sensitivity, Hearing Threshold Level, Interaural Cross-Correlation Coefficient, Knudson′s Law, Noise Exposure Limits, Noise Reduction Rating, Otologist, Smell, Sonic, Sound, Temporary Threshold Shift, Threshold of Hearing, Weber-Fechner Law.

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Subjects: Medical Noise & Vibration