within earshot
Close enough to clearly hear what someone says or does. They didn't realize I was within earshot when they were discussing my performance in school. Let's step outside—I don't want to fight while they're within earshot.
*within earshot (of something)
close enough to something to hear it. (*Typically: be ~; come ~; get ~; move ~.) As soon as I got within earshot of the music, I decided that I really didn't belong there.
within ˈearshot (of somebody/something)
near enough to hear somebody/something or to be heard: As she came within earshot of the group, she heard her name mentioned.