Absolute threshold of hearing

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Average click-evoked waveforms and Average hearing thresholds for younger and older adults

Absolute Threshold of Hearing

The absolute threshold of hearing refers to the minimum sound intensity that can be detected by the human ear. It is a fundamental concept in audiology and psychophysics, providing insights into the sensitivity of the auditory system.

Overview

The absolute threshold of hearing is typically defined as the lowest level of sound that can be perceived by a person with normal hearing under ideal conditions. This threshold varies depending on the frequency of the sound wave, with the human ear being most sensitive to frequencies between 2,000 and 4,000 Hz.

Measurement

The absolute threshold of hearing is usually measured in decibels (dB) SPL and is represented on an audiogram. Various methods, such as the method of constant stimuli or the method of limits, are employed to determine an individual's absolute threshold of hearing.

Factors Affecting the Absolute Threshold of Hearing

Several factors can influence an individual's absolute threshold of hearing, including age, gender, and exposure to loud noises. Hearing loss, whether temporary or permanent, can also impact an individual's ability to detect sounds at low intensities.

Significance

Understanding the absolute threshold of hearing is crucial in fields such as audiology, where it helps in diagnosing hearing impairments and designing appropriate interventions. It also plays a role in noise control and the development of standards for safe sound levels in various environments.

See also

• Audiogram
• Audiology
• Decibel
• Hearing loss
• Psychophysics