Blueprint: Hearing Screening with a Smartphone — Implementation Specification

Implementation specification for the gated smartphone pure-tone hearing screening protocol: per-model calibration condition, ambient-noise gate (full protocol at or below 35 dBA, abort above 40 dBA), tone presentation at 500-4000 Hz from 10 to 70 dB HL, and the binary pass/refer decision rule at a better-ear pure-tone average of 35 dB HL, carried from the source paper's error budget (PTA standard deviation 4.126 dB in a quiet room with calibration). DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT, NOT CLINICALLY TESTED. Blueprint for the protocol published as DOI 10.5281/zenodo.24108625.