Back عتبة مطلقة للسمع Arabic Llindar d'audició Catalan Hörschwelle German Absolute threshold of hearing English Umbral de audición Spanish Kuuldelävi ET آستانه شنوایی مطلق FA Kuulokynnys Finnish Seuil absolu d'audition French Prag čujnosti Croatian
The absolute threshold of hearing (ATH) is the minimum loudness of a pure tone that an average ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the organism. This is also known as the auditory threshold.
The threshold of hearing in humans is 20 µPa (micropascals) = 2×10−5 pascal (Pa). The tympanic membrane of the ear operates as a sound pressure sensor, as does a microphone.[1][2]