It is possible to turn off sound effects on Facebook simply
If you want to disable this sound effect, users can follow the following tips:
On iOS devices
Activate the Facebook app on the device, then click the More option located in the lower right corner of the app.
Operation performed on iOS
In the interface that appears, click the Setting / Sound option.
In the In-App Sounds section , slide the slider to Off mode.
On Android device
Activate the Facebook application on the device, then click the More option ( 3 dash icon ) located in the upper right corner of the application interface.
Operation done on Android
In the interface that appears, click the App Setting option .