Fun & Easy Science for Kids
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Secret Listening Device Facts for Kids Video


                                        Secret Listening Device

A stethoscope is often considered as a symbol of a doctor’s profession but also used by safe crackers and auto mechanics. They use it to hear sounds that cannot be heard otherwise. In this science experiment, you can make a secret listening device at home with the help of a stethoscope and some other stuff that can be easily found in the local market.

Materials Required: –

  • A stethoscope
  • Multimedia microphones
  • Drill
  • Hot glue
  • Mini-stereo Y-adapter
  • A digital recorder

Procedure: –

  • Carefully disassemble the microphones to get two mini condenser mics.
  • Remove the earplugs from the stethoscope and drill them so that the microphones can fit into them.
  • Now reassemble the earpieces with a stethoscope with hot glue.
  • Plug them into a mini-stereo Y- adapter.
  • Connect the mini-stereo Y- adapter to the digital recorder or an MP3 player.
  • Now you can put the stethoscope’s diaphragm anywhere and record the sound.
  • You can also press it against a wall and there are chances you would be able to hear the sound.


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MLA Style Citation

Declan, Tobin. " Fun Experiment for Kids to Make a Secret Listening Device ." Easy Science for Kids, May 2020. Web. 28 May 2020. < >.

APA Style Citation

Tobin, Declan. (2020). Fun Experiment for Kids to Make a Secret Listening Device. Easy Science for Kids. Retrieved from

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