Caliper: Headphone Measurement

Caliper measures headphones on an acoustic fixture and produces a result a stranger can check. Any app can draw a curve. The hard part is knowing whether the same headphone, measured again, would give you the same curve — because if it would not, the differences you are reading belong to how it was sitting, not to the headphone. So Caliper asks for a few captures instead of one, and spends them establishing its own error budget. WHAT IT DOES • Drives a logarithmic sine sweep through one earcup at a time and records both capsules. • Applies your rig's per-capsule calibration, bound by capsule serial, so a calibration from another fixture cannot be used by mistake. • Refuses a capture that fails its own quality gates: signal-to-noise, distortion, clipping, and whether the headphone is actually sealed on the fixture at all. • Selects the medoid of a set of seatings rather than averaging…