Spontaneous echo effect?

I was thinking of the old teddy bears which let kids talk to them and a chip recorded the sound and talked back. That made me think how creepy it would be to people walking through a Halloween haunt if they suddenly heard their own words repeated behind them. A quick search led me to this site:


It seems pretty inexpensive, but you need to hold down a button to record and push another to playback.

Any electronic geniuses who could create an ambiance prop that records and plays back ever 10-20 seconds or so? Hopefully one that does not involve elaborate reprogramming.

Maybe there is an off the shelf option I am not aware of. That would be welcome too.

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Kiteman6 years ago
Wire in pressure-pads instead of switches - you then record what they say whilst stood in one area, and then the next display feeds back their own words.

justjimAZ (author)  Kiteman6 years ago
That's not a bad idea kiteman. I would like it in the same area though. I worry about people standing on both the record and playback switches at the same time.
Use two pressure pads, separated by more than a human stride-length. McMaster-Carr sells a bunch of different kinds. They also have switch mats.

The latter are quite pricely for a one-off; we bought one for my grandfather's home, to notify his caregivers (through a doorbell) when he got up from his chair, and it was reliable for more than five years.
Make it a see-saw...

NachoMahma6 years ago
.  I'd look into audio delays. Something with a 10-20 sec loop should do what you describe (and no trigger switch is needed - turn it on and let it run).
You may also need some full-duplex hardware, to make sure it doesn't hear itself and build up feedback.
lemonie6 years ago

Delay-pedal? (Guitar-type)