Hissing during calls

[Guest DMM88]

Hello,

During calls I hear a hissing. It's low and it does not interfer with the call quality... but i'm wondering if anynone else is experiencing this.

Looks like when I put my hear on the proximity sensor I hear the hissing louder.

Does the proximity sensor produces any sound?

Thanks.

[Guest hydo1]

I think that this is an issue with the blade's audio cards, whenever there is sound playing there is always that background hiss. I have noticed this even when playing music through headphones however when exactly the same audio file is played on my Atrix there is no background hiss.