YOU SAID:

hearing protection must be worn

INTO JAPANESE

聴覚保護を着用しなければなりません。

BACK INTO ENGLISH

Must wear hearing protection.

INTO JAPANESE

聴力保護具を着用する必要があります。

BACK INTO ENGLISH

You need to wear hearing protection.

INTO JAPANESE

聴力保護具を着用する必要があります。

BACK INTO ENGLISH

You need to wear hearing protection.