Guess that depends on what you consider to be excessive noise, Burney.
The Scottsman flakers manufacture ice on a continuous basis. Most of their noise is caused by the motor, though you also might hear when the water reservoir fills. Now that you mention it, the Scottsman is a pretty quiet machine
The manitowoc (and similar models) manufactures ice by the sheet. Walking by it, I can hear the water when it circulates over the grid. When it goes into its harvest mode, the whole sheet drops, breaking into cubes when it hits a metal plate. By its nature, that would probably generate a lot more noise than you're used to. Back in our kitchen, the noise isn't a factor. I hadn't considered that it might be a much bigger deal in some concession areas.
BTW... though I also like(d) the flaked ice more, I was told by Coca Cola that drink carbonation doesn't hold up as well as it does with cubes. Don't know how true that is, but I have found other things that will affect how carbonation holds... like impurities in the water and cup coatings.