Hearable
Audible, To Be Able To Hear, To Be Heard, To Be Audible, Can Hear
intransitive verb, ichidan verb
You've seen 聞く by now hopefully. This is similar, but instead of meaning "to hear" it means hearable (or to be audible). Just think about that こえ hanging off there as the voice you can hear.
The reading comes from 聞く, so if you know the reading of that word, you can apply it here.
音が聞こえる
able to hear a sound
耳が聞こえる
able to hear
声が聞こえる
able to hear someone's voice
聞こえたんだったら、ちゃんと返事してよ！
If you could hear me, you should've said something!
オナラ、聞こえちゃったよね？
You heard my fart, didn't you?
きつい言い方に聞こえることは分かってるんだけど、つまらない言い訳はしたくないの。
I understand it sounds harsh, but I’m up to my neck in lame excuses.