👉 Redecussation is a phenomenon observed in certain types of sound waves, where the frequency or pitch of a sound changes when the distance between its source and listener increases. This effect is most commonly seen in sound waves traveling through air, but it can occur in other media as well. In simple terms, redecussation means that the intensity or loudness of a sound decreases or increases slightly as it travels from one medium to another, depending on the distance between the source and listener. The
