As a side note, I observed something connected with printers and their noise. We (I am talking of a small hotel) used to have a needle printer (for receipt/inv

As a side note, I observed something connected with printers and their noise. We (I am talking of a small hotel) used to have a needle printer (for receipt/invoices, it printed only a few lines of text as we used letterhead paper/forms), so the customer at check out would pay and just after the card was swiped on the POS or the cash was collected/change given, the receipt/invoice would be printed together with the "visual feedback" of seeing the paper fed under the head of the printer line by line and the "noise feedback" of the actual printing. It took something like 5-6, maybe 7 seconds, not much, but enough to introduce a delay in the procedure. Then things changed and now there is a thermal printer for receipts and a laser one for invoices, both are overall slightly faster than the old printer, some 4-5 seconds. But both pause (silence) for 3-4-5 seconds and then instantly the slip of thermal paper comes out (very, very fast) or the sheet of A4 paper exits the laser printer (in practice appears from a black box). Even if overall the time now needed is (slightly) less, we had more than one of the usual customers notice how it (seems like it) takes more time now to print the receipt/invoice, and the "impression" is exactly that, the silent pause seems everlasting while the wheezing of the old printer seemed "natural".