LG G5 loud piercing intermittent sound out of nowhere. Help!

[DuarteDave]

Comes out of nowhere..not all the time.
When I have volume on (not vibrate) phone will make a loud 1 second interval on/off "home fire alarm" sound.
Very annoying. Phone has never got hot, holds a great charge, and I can surf the net as usual.
I am with Sprint and cannot find any solutions online or anywhere. Has anyone else seen this?
Dave

 

[SilverZero]

Comes out of nowhere..not all the time.
When I have volume on (not vibrate) phone will make a loud 1 second interval on/off "home fire alarm" sound.
Very annoying. Phone has never got hot, holds a great charge, and I can surf the net as usual.
I am with Sprint and cannot find any solutions online or anywhere. Has anyone else seen this?
Dave

Could be one of your open browser tabs. Are you visiting any questionable web pages? (Not from personal experience, just saw something similar on another forum.)