I usually mute the sounds while playing the games because it gets pretty annoying for a long session when you just hearing the same sound over and over again. And it is true to an extent that sounds can manipulate the brain and can urge for more but it's more common at young age, like kids and adolescents not for an adult but to gamble legally, you need to be an adult of age over 18+. What I will say is about the animations that does the same or even more effectively than sound but when you mute the effect can be negligible with just the animation.
And do you know that game animations can be turned off as well, most especially slot games since I don't know or I am not so very sure if this feature exist on other games like casino and table games alike.
I also like to turn off music or sound when ever I am gambling because for me, the sounds create distractions, gambling in a noisy environment simply means that one will have to be gambling with lack of attention to the game and the inability to think properly and reason logically to atleast, better the gambler's chances of wining at the end.