Previously, I experimented with recording footstep sounds using a piezo contact microphone. Overall, the quality was quite poor—the recording contained excessive noise and failed to capture mid-to-low frequency ranges properly, so it didn’t sound much like actual footsteps. As a result, I decided to try using a clip-on contact microphone, which is commonly used for recording instruments. To avoid unnecessary expenses, I purchased only one first to test it out, and if the recording proves sufficient, I plan to purchase another one later.

I attached it to a slipper for the initial test.

Compared to before, the footstep recordings came out much better, and with filtering applied, the footsteps became even clearer. However, due to the nature of slippers, the microphone had to be attached in the space where the strap and the top of the foot meet, which generated a fair amount of noise. Since the recording using this contact mic shows promising results, I plan to buy one more and conduct the next experiment by attaching it to a sneaker.