yeah it’s more realistic.
I don’t think he did it to be realistic, I mean most of Kill Bill is unrealistic. I think he loves putting these little details and nifty dtuff in his films (as do I!), they make his films more interesting, and when he uses the same technique more than once, it automatically puts itself in the ever so large and always increasing list of “Tarantino trade-marks”. QT loves having consistencies in his films, I believe this ‘not hearing something because of a kitchen appliance’ is one of them.