A wavelet used for filtering signals. Daubechies (1988, p. 980) has tabulated the numerical values up to order 
.
Daubechies Wavelet Filter
See also
WaveletExplore with Wolfram|Alpha
References
Daubechies, I. "Orthonormal Bases of Compactly Supported Wavelets." Comm. Pure Appl. Math. 41, 909-996, 1988.Press, W. H.; Flannery, B. P.; Teukolsky, S. A.; and Vetterling, W. T. "Interpolation and Extrapolation." Ch. 3 in Numerical Recipes in FORTRAN: The Art of Scientific Computing, 2nd ed. Cambridge, England: Cambridge University Press, pp. 584-586, 1992.Referenced on Wolfram|Alpha
Daubechies Wavelet FilterCite this as:
Weisstein, Eric W. "Daubechies Wavelet Filter." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DaubechiesWaveletFilter.html