Help Google Now audio won't come through headset

[Ahroiter]

Hi there,

I have a Plantronics Voyager Edge bluetooth headset and it works perfectly with my LG G3. Except that when I activate Google Now I get the beeps from my headset, but no sound from the app. For instance:

"Ok Google, find me cat pictures"
It does a search for cat pictures but doesn't say "Here are cat pictures" or whatever.

Any thoughts?

Thanks