[noun] [U] - the range of distance within which it is possible to be heard or to hear what someone is sayingI nervously reminded her that the boss was sitting well within earshot.I don't think you should say anything while she's still in earshot.Wait till she's out of earshot before you say anything.
EARSHOT
Meaning of EARSHOT in English
Cambridge English vocab. Кембриджский английский словарь. 2012