# Translations:Useful attenuation mechanisms/27/en

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The absorption coefficient, as given by equation **2**, increases with frequency. Thus, as a wavelet travels, it loses more and more high-frequency values. As a result, a wavelet broadens with the distance it has traveled. The deeper the reflection is, the greater is the loss of the higher frequencies. How far can a wave (of frequency 39 Hz) travel before it is reduced to one-tenth of its original amplitude? From equation **2**, we see that the absorption coefficient is