DIY Ultra-low frequncy Rotary Subwoofer - Testing with oscilloscope

This video shows the rotary subwoofer being tested at my university in sheffield. i was selling this unit to a client who came all the way from south africa to see it.

The video is only short because my client did not want his face or voice present on the internet / youtube, so to respect his wishes i had to remove 90% of the video. the full video is actually 39 minutes long and explains the correlation between the frequency of the sound and the RPM of the motor with graphs and other bits.

thank you to Sheffield hallam for letting e use their facilities

Видео DIY Ultra-low frequncy Rotary Subwoofer - Testing with oscilloscope канала Chris Hudlin