If you look at the transducer (the device that converts an audio signal's voltage into acoustic pressure, or audible sound) inside most headphones, you'll see it's located directly in the center of the ear cup.
Maximum PC - May 2005 - Page 75
The aim of the tests carried on with these syllable series was, by means of repeated audible perusal of the separate series, to so impress them that immediately afterward they could voluntarily be reproduced. Hermann Ebbinghaus
Unfortunately, it happens all too seldom that you really disappear behind a work, that you are no longer audible as an interpreter. Dietrich Fischer-Dieskau
We worked on solving the problem of voice communications in a noisy military environment. We established military codes that are highly audible and invented selection tests for personnel who had a superior ability to recognize sound in a noisy background.
M. H. Abrams
We worked on solving the problem of voice communications in a noisy military environment. We established military codes that are highly audible and invented selection tests for personnel who had a superior ability to recognize sound in a noisy background. M. H. Abrams
Words are but the vague shadows of the volumes we mean. Little audible links, they are, chaining together great inaudible feelings and purposes. Theodore Dreiser