How can I stop my Facebook notifications from sounding through my Bluetooth devices?

[Drewsif]

This may sound stupid but when Im connected to any Bluetooth device (car, earbuds, headphones, etc...), Facebook notifications seem to come out of my phone as well as my connected bluetooth device. How do I change it so it only comes out of my bluetooth device? 

Thank you

[3Fees]

Turn off notifications from Facebook.

Cheers
3Fees

[Popsicle20]

I think you may be looking for Settings >Sounds and vibration > Separate app sound.

I don't use this myself, so I can't tell you much about it.