Audiology
Audiology (from Latin audīre, "to hear"; and from Greek -λογία, -logia) is a branch of science that studies hearing, balance, and related disorders. Its practitioners, who treat those with hearing loss and proactively prevent related damage, are audiologists. Employing various testing strategies (e.g. hearing tests, otoacoustic emission measurements, videonystagmography, and electrophysiologic tests), audiology aims to determine whether someone can hear within the normal range, and if not, which portions of hearing (high, middle, or low frequencies) are affected, to what degree, and where the lesion causing the hearing loss is found (outer ear, middle ear, inner ear, auditory nerve and/or central nervous system). If an audiologist determines that a hearing loss or vestibular abnormality is present he or she will provide recommendations to a patient as to what options (e.g. hearing aid, cochlear implants, appropriate medical referrals) may be of assistance.
Hearing
Hearing, or auditory perception, is the ability to perceive sounds by detecting vibrations, changes in the pressure of the surrounding medium through time, through an organ such as the ear. The academic field concerned with hearing is auditory science.
Hearing
Within a bony labyrinthean cave,
Reached by the pulse of the aërial wave,
This sibyl, sweet, and Mystic Sense is found,
Muse, that presides o'er all the Powers of Sound.
Abraham Coles, Man, the Microcosm; and the Cosmos, p. 51.
Hearing
Such an exploit have I in hand, Ligarius,
Had you a healthful ear to hear of it.
William Shakespeare, Julius Cæsar (1599), Act II, scene 1, line 318.
Hearing
Alcmaeon was, says [J.] Wachtler, the first who attempted to explain the phenomenon of sound and our perception of it by reference to the structure of the ear itself. Empedocles to some extent follows or agrees with him. ...Empedocles teaches that hearing is caused by the impact of the air-wave against the cartilage which is suspended within the ear, oscillating as it is struck, like a gong.
John Isaac Beare, Greek Theories of Elementary Cognition from Alcmaeon to Aristotle (1906)