Hearing

An earplug is a device that is meant to be inserted in the ear canal to protect the user's ears from loud noises or the intrusion of water, foreign bodies, dust or excessive wind.

Hearing loss, also known as hearing impairment, is a partial or total inability to hear.

The auditory system is the sensory system for the sense of hearing.

Hearing, auditory perception, or audition is the ability to perceive sound by detecting vibrations, changes in the pressure of the surrounding medium through time, through an organ such as the ear.

The threshold of pain or pain threshold is the point along a curve of increasing perception of a stimulus at which pain begins to be felt.

Audiometry (from Latin: audīre, "to hear" and metria, “to measure") is a branch of Audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies.

A Shepard tone, named after Roger Shepard (born 1929), is a sound consisting of a superposition of sine waves separated by octaves.

Autophony or tympanophony is the unusually loud hearing of a person's own voice.

Saccular acoustic sensitivity is a measurement of the ear's affectability to sound.

In human neuroanatomy, brainstem auditory evoked potentials (BAEPs), also called brainstem auditory evoked responses (BAERs), are very small auditory evoked potentials in response to an auditory stimulus, which are recorded by electrodes placed on the scalp.

The precedence effect or law of the first wavefront is a binaural psychoacoustic effect.

Hyperacusis (also spelled hyperacousis) is a health condition characterized by an increased sensitivity to certain frequency and volume ranges of sound (a collapsed tolerance to usual environmental sound).

Auditory masking occurs when the perception of one sound is affected by the presence of another sound.

Auditory processing disorder (APD), also known as central auditory processing disorder (CAPD), is an umbrella term for a variety of disorders that affect the way the brain processes auditory information.

Speech perception is the process by which the sounds of language are heard, interpreted and understood.

Speech Transmission Index (STI) is a measure of speech transmission quality.

Pure tone audiometry (PTA) is the key hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss.

Ohm's acoustic law, sometimes called the acoustic phase law or simply Ohm's law, states that a musical sound is perceived by the ear as a set of a number of constituent pure harmonic tones.