I'm trying to make a cat purr noise but I'd like to do it more mechanically than using a sound file. It needs to fit into a box you can hold in your hand. I'm thinking of using a slow motor with a fan that flaps against a serrated edge but how can I get it low hertz like a cat? Thanks in advance for any ideas.

  • 1
    If the pitch is too high, the obvious answer is to slow the motor down. If you can't do that, try slowing the audio file after it is recorded. – Rory Alsop Oct 15 '18 at 11:28
  • Thank you. The motor needs to be fast enough to buzz like a purr, if I slow it down it won't work. I'm hoping to do it without using an audio file at all, just a purely mechanical purr. – Lisa Cole Oct 15 '18 at 20:54
  • 1
    Slow it, and add more spokes to the fan. Then it can buzz but be lower in frequency – Rory Alsop Oct 15 '18 at 21:04
  • Ah, genius idea. Thank you! Do you know of any materials that sound deeper than others? Metal is a bit pingy. – Lisa Cole Oct 16 '18 at 5:19

Not mechanical, Voice Recorder Device Very High Quality with Play Back for Stuffed Animal Inserts and Craft Projects:


  • thank you! not what I wanted for this project but good for another :-) – Lisa Cole Jan 9 at 15:58

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.