Status: educational explainer. This page reports no experiment results. Project S.P.H.E.R.E. is at the proposal stage, hypotheses are not findings, and nothing here amends the draft LOC-1 protocol.
Guides
- What is DeSci? Decentralized science, explained
DeSci is shorthand for decentralized science: a set of ideas for making research funding, review and data sharing more open and less dependent on a few gatekeepers. - Open science explained
Open science means making the methods, data and conclusions of research available so that others can inspect, challenge and build on them. - Preregistration explained: why plan before you measure
Preregistration means writing down your hypothesis, design and analysis plan, and time-stamping it, before you look at the outcome data. - The replication crisis and reproducibility, explained
In several fields, attempts to repeat published studies have often failed to match the original results. Here is why that happens and what helps. - Publishing null results: why "no effect" is still a finding
A well-designed experiment that finds no effect still tells us something: it bounds how large any effect could be under the conditions tested. - What is resonant frequency?
Every elastic object has natural frequencies at which it vibrates easily. Drive it at one of them and the response grows large: that is resonance. - Vibration modes of a sphere: copper sphere resonance basics
A solid elastic sphere has a whole family of vibration modes. Their frequencies follow from its radius, density and elastic properties. - Laser Doppler vibrometer basics
A laser Doppler vibrometer measures how fast a surface moves by analyzing the shift in frequency of laser light reflected from it. - Blinding in physics experiments: blind analysis explained
Blinding hides information that could bias a measurement or analysis, so that the result cannot be nudged, even unintentionally, toward what the researcher expects. - Measurement uncertainty and metrology: an uncertainty budget primer
Every measurement has an uncertainty. Metrology is the science of measurement; an uncertainty budget is the list of everything that limits how well you know the answer. - How independent research gets funded
Researchers outside large institutions piece together support from several sources. What keeps any of them trustworthy is transparency about money and independence. - Digital twin simulation in physics: what it can and cannot show
A simulation models how a system should behave under stated assumptions. It is a planning tool, not a measurement. - Can sound change an object's resonant frequency?
Sound forces an object to vibrate but does not retune it. What really shifts a natural frequency, and how to tell a real change from an apparent one. - How to measure a sphere's resonant frequency and mode shapes
A step-by-step overview of measuring a sphere's natural frequencies, damping and mode shapes: support, excitation, sensors, FRFs and common pitfalls. - How to shift a resonant frequency: mass, stiffness and heat
Compare ways to change an object's resonant frequency: added mass, geometry, temperature, supports, shunts and active control, and which are reversible. - Impulse response measurement: sine sweeps and deconvolution
How an exponential sine sweep and deconvolution give a clean impulse response, how to recreate a resonance from it, and why replay cannot retune an object. - Modal analysis glossary: FRF, MAC, Q factor and more
Plain-language definitions of natural frequency, mode shape, damping ratio, Q factor, FRF, coherence, MAC, aliasing and other resonance-testing terms.
About the project behind the guides
Project S.P.H.E.R.E. (Spatial Positioning Harmonic Empirical Resonance Experiment) is an open, independent research proposal testing whether location alone changes the measured resonance of a controlled copper sphere. Start with the about page, the draft protocol or the whitepaper.