earwitness
/ˈɛrwɪtəs/Definitions
1. noun
A person who witnesses or experiences an event through hearing, often without seeing it.
“The radio announcer became an earwitness to the massive storm as it swept through the city.”
2. noun
A person who hears a story or account of an event, but is not present to see it.
“The author’s vivid descriptions made her an earwitness to the historical event.”