When I press the gas, the engine sound change is subtle

Hello friends tepee alure 2013 when I press the gas in my car, a few seconds of subtle sound, the engine sound changes only what could be caused by the vehicle in motion The power of the vehicle is very good

First of all, welcome to us. Take a look at the turbo, my skin protection sheet screw etc. it may be loose. or another piece, so it's hard to say without seeing it.