Bunuel's use of 'white noise' sound?
I watched Bourgeosie the other day and I noticed that at various important times in the film something is said (very important) about the plot of the film and Buniel uses background noise (in this case, and airplane or background dinner noise) to mute their responses at specific times. I know they are on purpose, being familiar with other film infamous directors such as Burgman, Tarkovsky, Kurosawa etc... I was wondering if Bunuel is the inventor of this device, and what is to be known about his use of it. I noticed that "That obscure object of desire" this device is used as well.