Question:
If one generally says brachos out loud, is it better to say a bracha silently when in front of a non frum or off the derech person if one knows they will not say Amein?
Thanks
Answer:
You do not have to say the bracha quietly, you are giving them the opportunity to say Amein, and even if they don't say Amein, just hearing the bracha being made is a zechus for them.
Sources:
Horav Y. Cahren shlit"a