Examples
Examples
Try the starting example
- Magnitude at bin k−1
- 0.3
- Magnitude at peak bin k
- 1
- Magnitude at bin k+1
- 0.6
- Peak bin k
- 5
- Bin spacing (Hz)
- 10
- Parabolic peak offset (bins)
- 0.136364
- Estimated peak frequency (Hz)
- 51.363636
Try another scenario
- Magnitude at bin k−1
- 0.33
- Magnitude at peak bin k
- 1
- Magnitude at bin k+1
- 0.6
- Peak bin k
- 5
- Bin spacing (Hz)
- 10
- Parabolic peak offset (bins)
- 0.126168
- Estimated peak frequency (Hz)
- 51.261682
Calculation method
Calculation method
Parabolic peak offset (bins)
0.5(left−right)/(left−2peak+right).
Estimated peak frequency (Hz)
(k+offset) × bin spacing; magnitude-domain parabolic interpolation.
Symbols and units
- a
- Magnitude at bin k−1
- b
- Magnitude at peak bin k
- c
- Magnitude at bin k+1
- d
- Peak bin k
- e
- Bin spacing (Hz)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Spectrum peak neighborhood, selected estimator. Returns Peak-frequency estimate. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Magnitude at bin k−1: minimum 1e-12, maximum 1000000000000.0. Magnitude at peak bin k: minimum 1e-12, maximum 1000000000000.0. Magnitude at bin k+1: minimum 1e-12, maximum 1000000000000.0. Peak bin k: minimum 0, maximum 10000. Bin spacing (Hz): minimum 1e-12, maximum 1000000000000.0.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.