No sound from ikon projector when using Netflix app on the PS3

[Sofa king]

I have an ikon projector with my PS3 hooked up to it. If I'm gaming or watching something on YouTube I have sound , however if I use the Netflix app I was get no sound what so ever. Any way to fix this ?

 

[Sofa king]

MERGED QUESTION
Question from Sofa king : "Ikon projector to ps3"

I bought an ikon projector 400. I hooked up my PS3. Now the projector has speakers however when I play any games the sound usually cuts out 20 mins (roughly) if I use the YouTube app on the PS3 it seems to work ( wasn't on it for very long how ever ) but if I use the Netflix app there is no sound whatsoever. Do I need to purchase speakers for the projector ? There are audio inputs on the back. Will there be sound If I do purchase will playing games or watching movies ?