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Measuring Car Horns: Phone Apps vs. Court Evidence
Can you really use a spectrogram app on your Android phone to identify a specific car horn for legal evidence? The short answer is no — not without significant calibration and hardware upgrades. This episode dives into the physics of sound measurement, from MEMS microphone frequency responses and FFT bin widths to the Nyquist theorem's unforgiving precision. We explore why casual detection and court-admissible evidence are worlds apart, and walk through the actual tools — calibrated measurement mics like the Dayton iMM-6, Audacity, and Raven Lite — that can get you there. If you've ever…
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