Wavelet Neural-Networks is fallen into relax-type and close-type. In the former, wavelet analysis is used as prepositive control and supply eigenvector for NN. Nerve cell is formed with wavelet function and scale function to integrate wavelet and NN in the latter. In relax-type wavelet NN to inspect on-line tools faults, state data of tool is collected by sound-sensor, the data is processed with wavelet analysis, and picks up eigenvalues to confirm input-vectors of NN. Those data is exercised BP NN, and adj...