Acoustic Saturation: 27-frequency layer experiment with 300mm steel waveguide

[Generator8833]

Hello KVR community,
I am sharing my long-term experiment in environmental acoustic saturation and resonance.
The Hardware:
• Signal Source: Honor 6A smartphone.
• Acoustic Waveguide: Heavy steel pipe (300mm diameter, 8mm wall thickness, 1.6m length).
• Ground Coupling: A network of 60mm steel pipes driven 2 meters into the soil, connected to massive steel gate structures.
The Signal (DSP): I created a 3-hour 5-minute master track that layers 27 specific frequencies (ranging from 31.32 Hz up to 10 kHz). It uses both Sine and Sawtooth waves. Specifically, I'm using a 144 Hz Sawtooth wave to test structural vibration and "cleaning" effects on the environment. The track is modulated with resonant linguistic patterns (Latin).
The Goal: To study how high-mass steel structures act as passive resonators and physical Low-Pass Filters, and how the soil retains these vibrational signatures over time.
Has anyone here experimented with ultra-low frequency saturation using industrial metal masses as speakers/waveguides?
Looking forward to technical feedback on frequency layering and vibration retention.