To be a disciplined gambler you should have a matured mind, see those sounds are things that makes the game fun, if possible get an ear plugs to block it out if you can't handle it, don't underestimate the power of sounds on your psychology.
You mean not to hear the sound of the slot machine or the casino games? I enjoy gambling with the sounds most of the time that I am gambling. Even if my device is having low volume, I slightly increase the volume so that I can hear the sound of the games. That does not make I am an addict or not disciplined but it is what I love. I can not be playing the games without the sound, I will not enjoy it. This is not about mean been kiddy or not. It is not about it.
You are a different person that's why you are not attracted by the sound, I am not also attracted by gambling sound but there are many gamblers that loose attention, loose discipline whenever the sound is been heard, they start shaking their legs, the brain starts to think how much could be made if $100 is been staked right now, their brain starts becoming wild and so they start gambling immediately.
Truly, gambling sound can cause major addictive arousal on some gamblers and less on some players too.