कुल हार्मोनिक विरूपण कैलकुलेटर — सूत्र

FFT Frequency Resolution

The FFT converts time-domain data into frequency-domain bins. The resolution depends on how long you observe the signal.

Formulas

Frequency Resolution = Sample Rate / FFT Size

Time Window = FFT Size / Sample Rate

Useful Bins = FFT Size / 2 + 1 (for real signals)

Trade-off

Better frequency resolution requires longer observation windows. This is the time-frequency uncertainty principle.

Larger FFT = finer frequency resolution but slower updates

Smaller FFT = coarser resolution but faster updates