...The drone of the motor was barely audible inthe closed cabin and did not interfere... 
Various 「Astounding Stories, August, 1931」
..., to be heard, be audible...
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
... a weak voice became audible...
Antonio de Trueba Henry J. Gill 「The Cid Campeador」
... so low as scarcely to be audible...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...When we next paused to listen, the hoof-beats were not audible, and we relaxed our pace...
Anthony Hope 「The Prisoner of Zenda」
... Then with a sudden audible catch in his breath, he stopped short...
Rafael Sabatini 「Captain Blood」
...The lapping of the wavelets of the lake against the foot of the palacewall was distinctly audible in the utter and almost breathless silencewhich ensued...
Edgar Rice Burroughs 「Tarzan the Terrible」
... in quite audible tones:...
Harry Collingwood 「The Adventures of Dick Maitland」
...As the soundsbecame more audible, it was evident that thehounds had split into three packs—conclusivethat there were at least three wolves...
Various 「Hunting in Many Lands」
...Even in the species having the lowest pulse rates, thepulsations are not audible...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...It isreadily audible at the distance of a mile when it breaks the stillnessof a summer night...
Nathaniel Southgate Shaler 「Domesticated Animals」
...The dog’s tonguewas out at any length, and his pant wasclearly audible...
Major Gambier-Parry 「'Murphy'」
...When the only sounds audible in the clearing werethe chirping of the crickets and the fluting of thebirds, a thin, yellow face with watery eyes peeredcautiously through the cane...
John Charles Beecham 「The Argus Pheasant」
...Rub the end of the moistened finger on a strip of glass, or awindow-pane, and you will obtain a very audible sound, somewhatanalogous to that emitted by the chafer...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...It grew brighter, and a roaring sound became audible...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
...The noise of pursuit gained slightly on them, and a sound as of intensebreathing became audible...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
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