Wavelet central frequency What is the definition of the central frequency of a Wavelet and the bandwidth of a Wavelet? How do they affect the resultant waveform of the wavelet?

Thanks.
It's not formally defined, however I've seen $\int_{-\infty}^\infty \omega |\Psi(\omega)|^2 d\omega$ be used in the literature (i.e. the centre of mass of $|\Psi(\omega)|^2$), where $\Psi$ is the Fourier transform of the wavelet $\psi$.