Beckify Electrical Engineering Toolbox
FFT / Audio Spectrum Analyzer
Real-time Hann-windowed audio spectrum for transformer buzz, motor harmonics, and noise characterization. Linear/log axis, averaging, peak-hold, PNG/CSV export of bins. No raw audio leaves the device.
About this calculator
Use this free browser-based calculator to work through the relevant electrical inputs, review the result, and compare it with field conditions.
For design, installation, or safety decisions, verify assumptions against the applicable code edition, equipment documentation, and site requirements.
Open the interactive tool