We found a list online of sounds you'll probably never hear again, and some are pretty recent . . . although the sound of a modem connecting DOES feel like it was 100 years ago.


Anyway, here are nine sounds that are either extinct, or so rare today that they might as well be . . .


1.  A factory whistle starting or ending a shift.


2.  A mechanical cash register.


3.  A steam locomotive.


4.  A car backfiring.


5.  A dial-up modem.


6.  TV static.


7.  A busy signal.


8.  A pager.


9.  A fax machine.