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Mu waves, also known as mu rhythms, comb or wicket rhythms, arciform rhythms, or sensorimotor rhythms, are synchronized patterns of electrical activity involving large numbers of neurons, probably of the pyramidal type, in the part of the brain that controls voluntary movement. person suppresses mu wave patterns when he or she performs a motor action or, with practice, when he or she visualizes performing a motor action. This suppression is called desynchronization of the wave because EEG wave forms are caused by large numbers of neurons firing in synchrony.
A North American telephony standard for converting analog voice into a digital data stream using pulse code modulation (PCM). The pulse code in PCM comes from the telephone company's method of sending a pulse or no pulse down the line. Mu-Law signals typically ride on a single 64 Kbps DS0 channel in a T1 line. Mu-Law uses a companding technique that provides more quantization steps at lower amplitude (volume) than at higher amplitude.