Volvo V60 Plug-In Hybird Sound

Today Volvo has asked their Facebook fans about their suggestions on what the Volvo V60 Plug-In Hybrid should sound like when it is driving on just the electric motors. The idea is simple. When the car drives using the electric motor it is very quite and therefore can be dangerous to pedestrians who will not be alerted by the usual motor noise.
So Volvo decided to "give it a noise."

Fot. testdrives.eu


People on Facebook have suggested sounds like the old T5, T6, R, D5, V8 and so on and so on. Some even suggested that owner should be able to change the sound himself which I think would be a genius feature. 

               fot. Top Gear


Or maybe you think that creating an artificial noise just because the car is quite, isn't a very good idea? Electric cars are better for the environment partly because they are quite, so why should we spoil it?


I would love to hear your opinions on this matter.
http://www.facebook.com/photo.php?fbid=10150327070727083&set=a.244121972082.140792.90086762082&type=1&theater