From the hum of an old car's engine to the galunk! of a fictional plumber's fireball, sounds have an amazing ability to transport us back in time.

Outside of our minds, however, sounds have a far less reliable lifespan -- especially within the realm of technology. As electronics evolve, so do the sounds that go with it -- and many of the dings, beeps, and hisses burned into our brains will hold no emotional connection to the teens of tomorrow. Some are already be meaningless to today's 20-somethings.





So crank up your speakers and get ready to mutter incomprehensible insults about "those darn kids these days." Here are 20 memorable tech sounds that are well on their way to being forgotten.