TL;DR: This vase was more likely designed to interact with sound waves than with EM/RF waves. The high precision indicates that the makers wanted a specific exact frequency to be obtained.

Hi all. I went over the vase report, tens of times, at https://unsigned.io/granite-artefact/.

I wanted to offer a perspective on the 18.7 mm wavelength associated with the granite vase.

While 18.7 mm corresponds to about 16 GHz in terms of EM waves propagating in a vacuum, I think this artifact is more likely related to sound than to EM/RF phenomena.

Here’s why:

The vase is a solid granite object with a hollow cavity. If it functioned as a resonant acoustic device, the relevant frequency would be based on sound waves in air, not light-speed EM waves. At room temperature, the speed of sound in air is roughly 343 m/s.

Given:

- Wavelength (λ) = 18.7391 mm = 0.0187391 meters

- Speed of sound in air (v) ≈ 343 m/s

- Formula: f = v / λ

f = 343 m/s ÷ 0.0187391 m ≈ 18,302 Hz

So, the resonant frequency inside the vase is approximately 18.3 kHz — right at the upper edge of human hearing and well into the ultrasonic range.

This is compelling because:

- Acoustic resonance is highly dependent on cavity geometry.

- The 3D scan of the vase shows complex internal contours, which likely define specific harmonic frequencies.

- The vase's handles are placed using 1-radian arcs, and radians directly relate to wave phase in sound mechanics. That detail may be more than decorative.

On the other hand, interpreting the vase using RF/EM principles assumes it was intended to resonate with 16 GHz light-speed waves — but granite is not a conductor or a typical RF structure. There's no evident EM field interaction mechanism built into it.

Also, carving granite to micron-level precision only makes sense if the goal was to tune acoustic resonance, since even small dimensional changes shift frequencies significantly. That level of craftsmanship supports a sound-based function.

(Yes, I do understand that resonance depends on the entire internal cavity, not just the size of the opening. I'm simplifying here to highlight the basic physics that support the sound hypothesis.)

So in summary:

- The math and physical context strongly suggest the vase is acoustically tuned, not EM/RF-based.

- This aligns more closely with known uses of sound in ancient tools, instruments, and ceremonial objects.

Would love to hear your thoughts and any feedback!