YOU SAID:

the speaker has been turned off and is no longer heard

INTO JAPANESE

スピーカーはオフになっており、もう聞こえません

BACK INTO ENGLISH

Speaker is off and can not be heard anymore

INTO JAPANESE

スピーカーがオフになり、もう聞こえません

BACK INTO ENGLISH

Speaker turned off and can not hear anymore

INTO JAPANESE

スピーカーがオフになり、もう聞こえません

BACK INTO ENGLISH

Speaker turned off and can not hear anymore