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.