YOU SAID:

What on earth was that banging sound?

INTO JAPANESE

どのような地球上の叩いて音でしたか

BACK INTO ENGLISH

What on Earth, was that sound?

INTO JAPANESE

いったい、何の音でしたか。

BACK INTO ENGLISH

On Earth, what's that sound?

INTO JAPANESE

いったい、何がサウンドのですか。

BACK INTO ENGLISH

Heck, what's that sound?.