noun
mishearing; failing to catch what was said
Refers to not hearing something correctly or missing part of what was said. Often used when someone didn't catch a word or phrase.
彼の早口で、聞き落しが多かった。
Because he spoke so fast, I misheard a lot.
大事なところを聞き落してしまった。
I missed an important part of what was said.
聞き間違い emphasizes hearing something incorrectly (misunderstanding the content), while 聞き落し focuses on failing to catch or missing part of the speech.
聞き逃す is a verb meaning to miss hearing something (often intentionally or by chance), whereas 聞き落し is a noun for the act of mishearing or missing a part.
Compound of 聞き (stem of 聞く, 'to hear') and 落し (noun form of 落とす, 'to drop'). Literally 'hearing drop', referring to missing or dropping part of what is heard.