YOU SAID:

it was so quiet you could hear a pin drop

INTO JAPANESE

ピンが落ちるのが聞こえるほど静かだった

BACK INTO ENGLISH

It was quiet enough to hear the pin fall.

INTO JAPANESE

ピンが落ちるのを聞くのに十分静かだった。

BACK INTO ENGLISH

It was quiet enough to hear the pin fall.