whistling noise

[meangreen93]

i just had my engine tuned up and when i got my truck back it now makes a whistling noise at certain rpm's[1,100-4,000]. can any one explain this? it almost soundslike the whine of a low boost super charger.

 

[Audio_1]

i have this same noise, i described it as a turbine engine spinning up. it happens around 35-50 mph, i wonder what it is also