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聞こえちゃう

can hear, be audible

→ 聞こえる
聞こえ can be heard, be audible + ちゃう Completion or unintended-result auxiliary
verb Rare #40,660
can hear, be audible A casual contraction of 聞こえてしまう; often suggests that something ends up being heard or is unintentionally audible.
JA: 隣の部屋の話し声が聞こえちゃう。
EN: I can hear the conversation from the next room.
Conjugation of 聞こえる
Present
聞こえる
Indicative past
聞こえなかった
聞こえて聞こえちゃう
Potential present
聞こえてる聞こえます

聞こえちゃうよ

They’ll hear you.

— クワイエット・プレイス (2018)

それは皮肉に聞こえちゃうかもね。

That might come across as sarcastic.

しーっ、聞こえちゃうってば。

Shh, they'll hear you.

隣に聞こえちゃうわ

The people next door will hear us.

— ロシアン・ブラザー (1997)