Can I create a car that powered by sound energy? If I create a car that has an ideal loudspeaker (that can emit sound with any positive real number of amplitude) on car roof then loudspeaker emit very very loud sound (sound may be complex or be pulse which has specific rhythm) , can this car move ?
I know that electromagnetic has momentum but I don't know that sound really hasn't momentum or it has ?
 A: No, a car with a speaker attached will not be propelled forwards. Sound waves are longitudinal waves and do not carry mass with them as they propagate and therefore do not have any momentum. The diagram below shows how longitudinal waves can send a vibration through a material without carrying any mass. Look at the red dots, they have no net movement and therefore the sound wave has no net momentum. 
The most that would happen to your car is that it would vibrate backwards and forwards as the speaker extends and retracts.
A: I disagree with Ryan's answer. A source of sound can cause acoustic streaming, which is a net flow of ambient fluid away from the source. See this demonstration. Therefore a source of sound experiences a back-thrust which can be utilised for propulsion, although it would likely be inefficient.
The picture of a vibrating medium, with no mean flow, which extends forever is correct only if the medium is non-dissipative, but any real fluid is dissipative. This gives rise to an effective body-force on the fluid given by the averaged quantity $\nabla\cdot\overline{\rho\mathbf{v}\mathbf{v}}$, in which $\mathbf{v}$ is the velocity field with zero mean corresponding to pure vibration.
