Source : Webster's Revised Unabridged Dictionary (1913)

Audible \Au"di*ble\, a. [LL. audibilis, fr. L. audire, auditum,
   to hear: cf. Gr. ? ear, L. auris, and E. ear.]
   Capable of being heard; loud enough to be heard; actually
   heard; as, an audible voice or whisper.

Audible \Au"di*ble\, n.
   That which may be heard. [Obs.]

         Visibles are swiftlier carried to the sense than
         audibles.                                --Bacon.

Source : WordNet®

audible
     adj : heard or perceptible by the ear; "he spoke in an audible
           whisper" [syn: {hearable}] [ant: {inaudible}]