classes:  lecturer. You speak in a hard to hear voice and you don't use a microphone so I can't understand everything you're saying.  curriculum. You speak in a hard to hear voice and you don't use a microphone so I can't understand everything you're saying.  facility. You speak in a hard to hear voice and you don't use a microphone so I can't understand everything you're saying.  general. You speak in a hard to hear voice and you don't use a microphone so I can't understand everything you're saying.