The intensity of a stimulus that will just barely produce a sensation. In pure tone audiometry, threshold is defined as the minimal hearing level at which an individual is able to respond to a tone at least fifty per cent of the time. It is this minimal hearing level that is plotted on an audiogram indicating an individual's best level of hearing for that frequency.
the lowest intensity of sound that can be heard. Although threshold of hearing is defined as 0 dB, it varies with different frequencies.
For a given listener, the minimum sound pressure level of a specified sound that is capable of evoking an auditory sensation. The sound reaching the ears from other sources is assumed to be negligible (IEC 84).
The faintest sound that can be consistently heard at each of the tested frequencies in an audiometric evaluation.
The lowest level sound that can be perceived by the human auditory system. This is close to the standard reference level of sound pressure, 20 µPA.
See Hearing Threshold.
The sound pressure level at which people can hear only 50 percent of the time.
The lowest sound that can be perceived by the human auditory system, generally considered to be 0 dB for persons with perfect hearing.
The lowest level that a particular sound's presence can be perceived by an individual more than half of the time.
The quietest sound humans can hear: 0 dB SPL. A convenient... ( more)
Sound level at which sound becomes perceptible to the human ear. Also, the 0 dB reference point for SPL readings.