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Different levels of coefficients and their corresponding brain waves
| Coefficients | Frequency Range (approx.) | Sub-band |
|---|---|---|
| First level detail coefficient (cD1) | 62.5-125 | - |
| Second level detail coefficient (cD2) | 31.25-62.5 | Gamma |
| Third level detail coefficient (cD3) | 15.63-31.25 | Beta |
| Fourth level detail coefficient (cD4) | 7.81-15.63 | Alpha |
| Fourth level approximate coefficients (cA4) | 0-7.81 | Delta and theta |
