Glider Frequency

Fix your phone to anything that vibrates and measure its frequency in Hz or per minute. Glider wings, wing beats, machine vibration, springs, flexing boards — anything that repeats. FEATURES - Finds the frequency by running an FFT on the accelerometer waveform - Estimates down to 0.01 Hz with a Hann window, zero padding and peak interpolation - Automatically removes the effect of tilt - Real-time frequency spectrum and confidence level - 10-second average - Adjustable analysis window (5, 10 or 20 s), sensor axis and minimum frequency - Built-in tutorial for first-time users HOW TO USE 1. Fix the phone firmly to the object, screen facing up 2. Press Start to begin a 3-2-1 countdown 3. Start the vibration and the frequency appears Measurement range is roughly 0.5–50 Hz.