Adjective
Being receptive or open-minded to new styles of music.
Antonym: closed-eared
Many people tend to listen to what they know, but others are more open-eared.
Listening closely to something; attentive.
Antonym: closed-eared
Companies should be open-eared to feedback from their customers.
Synonym of open-back (“partially covering the ear”)
Source: en.wiktionary.org