1、youmustspeakupandprojectyourvoiceevenifyouareusingamicrophone.2、yourvoiceshouldberesonantandsustainedwhenyouspeak.3、pitchyourvoiceslightlylowerthaormal.listenerstendtoassociatecredibilityandauthoritywitharelativelydeepvoice.4、trytoeneclarativesentencesonalowtonewithout,however,trailingoffinvolume.5、slowdown.1、即使是用麦克风，也要声音响亮并运气发声。2、声音要有回声并能稍持续一阵儿。3、音调要定得比正常
讲话时低一些，听众往往把可信度和权威性与一个相对低沉的声音联系在一起。4、尽量用...