classes:  lecturer. is not dissatisfied that the small defect is the voice when teaching although a little hard to hear.  curriculum. is not dissatisfied that the small defect is the voice when teaching although a little hard to hear.  facility. is not dissatisfied that the small defect is the voice when teaching although a little hard to hear.  general. is not dissatisfied that the small defect is the voice when teaching although a little hard to hear.