LG Stylo 2, unable to disable navigation button sounds

[Android Central Question]

I can't turn the little hiss sound off that happens when the navigation buttons are tapped. I've muted all sounds and even gone as far as disabling all sounds in Accessibility options. They still make little hiss sounds coming from the earpiece. Ideas?

 

[B. Diddy]

Welcome to Android Central! Is it vibrating when you touch the nav buttons?