Voice modulation is the process of adding variety to one’s voice by changing tone, pitch, speed and other voice components in order to make communications clearer, more interesting, more engaging and more evocative. Voice modulation among call center agents usually form part of a typical call center training because the transmission of customer service is essentially facilitated through verbal communication. Voice modulation in call centers is necessary because the parties in the communication, the alternating speaker and listener, are deprived of physically seeing each other during the communication process. In which case, voice modulation is used as a strategy to compensate for the loss of physical communication in the process. So how exactly is voice modulation performed.