Frequency chooses reach.
Ultrasound accuracy comes from time.
NL-SWI — Natural Locking Standing Wave — does not resolve a boundary by wavelength. It locks onto the target's own resonance and counts time.
How the lock works.
A short technical explainer — no patent internals, no parameters beyond what is public.
Explainer in production — built strictly from the published principle.
Three steps, one idea.
Emit
A standing wave is established between two transducers. No lenses, no phased arrays.
Lock
The wave locks onto the target's own resonance — thousands of uninterrupted cycles.
Count
Accuracy is derived from elapsed cycles. More time buys more precision.
How far ultrasonic phase measurement can reach.
An independent study at NASA Langley Research Center recorded a phase resolution of 0.00038 rad with a thickness error of −0.04 µm, using the same class of ultrasonic phase measurement. It did not test NL-SWI, and it was done in materials testing, not in tissue — but it shows the ceiling is far higher than conventional acoustic sensing assumes.
- Haldren et al. — Review of Scientific Instruments 89, 054902 (2018). doi.org/10.1063/1.5022989
- Pryor & Roscoe — speed of sound in the eye's fluid shifts with dissolved sugar, documented since 1954. doi.org/10.1088/0370-1301/67/1/310
These are consequences of the physics. We intend to prove them early, in public. Patent pending: Natural Locking Standing Wave Imaging (NL-SWI), U.S. Application No. 63/996,286, filed March 2026.
Four consequences fall out.
These are consequences of the physics. We intend to prove them early, in public.
Frequency becomes free
It sets reach, not resolution — a free parameter for the first time.
Hardware becomes simple
Two transducers. No lenses. No phased arrays. Brutally simple.
Faint boundaries amplify
A thin vessel wall or a hairline defect gets amplified instead of lost.
Precision scales with time
Longer measurement buys finer resolution — trade time, not frequency.
Architectural, not incremental.
We are not claiming measured superiority today. We hold a better physics thesis and intend to prove it in a lab, early, in public.
| Modality | Radiation | Through bone | Needle | Cost profile |
|---|---|---|---|---|
| Ultrasound | No | No | No | Low |
| CT | Dose | Yes | No | High |
| MRI | No | Yes | No | Very high |
| Blood glucose | No | n/a | Yes | Low |
| NL-SWI (design goal) | No | Designed to | No | Low |
The next step is a lab, not a launch.
We intend to prove the principle early, in public, on our terms.
Talk about proving it