8. The slide projector shuffle
It may very well be the quintessential sound of boredom: the unforgettable click-clack of a slide projector shuffling through its slides as someone shows you a bunch of images you have no interest in seeing.
Ah, the memories...
9. The mimeograph mix
Before copy machines, offices and schools relied on mimeograph machines to make far more manual (and potential messy) duplications. While the smell of the mimeograph may be the most memorable sensation, the sound of the system rolling and sliding leaves a one-of-a-kind imprint all its own.
10. The TV sign-off song
In today's 24/7 world, it's hard to imagine a time when televised entertainment wasn't always available. But not that long ago, TV stations signed off at the end of each broadcast day, sending out a friendly "nighty-night" message and playing the national anthem.
These days, we just have to settle for "Jerry Springer" reruns and ShamWow infomercials.
11. The VCR's voice
"Be kind, rewind" isn't the only tape-related artifact that'll be lost on future video-watchers. From the sound of a VHS (or beta) tape loading into a deck to the high-pitched hum of a video shuttling forward or back, the VCR is loaded with aural memories that are all on their way to extinction.
One of those sounds, of course, is the godawful noise of a tape unraveling -- and I don't think any of us will miss hearing that.