noun
familiar to the ear; well-known sound
Describes a sound, voice, or music that one has heard often and feels familiar with. Often used in the phrase 耳馴染みのある.
この曲は小さい頃から聞いていて、とても耳馴染みがある。
I've been listening to this song since I was little, so it's very familiar to my ears.
彼の声は耳馴染みがあって、すぐに誰だかわかった。
His voice was familiar, and I immediately knew who it was.
Compound of 耳 (ear) and 馴染み (familiarity, from verb 馴染む 'to become familiar').