Audio Experiment - Acoustic Resonance Tube

A video blog of a random experiment in sound. This is a simple device consisting of a stainless steel ventilation duct with a speaker at one end, mounted to a 4x4 with a chair leg mounted within to pin the tube down. the midrange speaker makes contact with the top of the tube.

I found the natural frequency (136hz) for the tube, which can be modulated by any tone you want to amplify. The "Fog horn" effect you hear in the video is produced by the tube itself matching 136hz frequency and resonating. If you listen closely, the tube continues to vibrate around 2-3 seconds after the audio is shut off.

Category:

Science & Technology

Tags:

• audio experiment
• acoustic experiment