Earshot implies a certain closeness; you're near enough to hear or speak without shouting. Let's move closer to hear them; we're not in earshot yet.
Pro Tip 2/3
Privacy Caution
Use 'earshot' to indicate when conversations might not be private due to nearby listeners. Discuss it later, we are still in earshot of our classmates.
Pro Tip 3/3
Out of Range
Saying someone is 'out of earshot' suggests they cannot hear you, offering privacy or isolation. Wait until he's out of earshot before you tell me the secret.