Faulty phone speaker

My dad is listening to some fields for heart after I asked him to, but I noticed a lot of static noise while he was hearing heart restoration field.
A few months ago, he told me that his phone’s speaker had issues, so my question is, will a faulty speaker make it pointless to hear the fields? Or it will work regardless.

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In my experience, yes
But there is a field in YT that repairs speakers, I used it years ago.

I don’t remember the name, but I keep thinking why sapien doesn’t have something like that. Maybe it specializes in the human body
I think