Throaty Noise coming on acceleration

I have a throaty noise coming when I'm on throttle, very similar too a sligh blowing exhaust but yet there's not evidence of my exhaust blowing. I have the standard exhaust nothings been changed or messed with. Just wondering if anybody can shine any lights on this.. Does the standard exhaust have a slight deep noise when on hard throttle? It's a 200.

cheers

Mike
 
I've only had the car 3 months so excuse my no existent knowledge! Are they prone to going are they? I'd say just after the engine
 
I've only had the car 3 months so excuse my no existent knowledge! Are they prone to going are they? I'd say just after the engine

Does like sound the flexi's. They are becoming more and more of a common issue and it's an expensive fix if it is.