可聴[kachou] audible
可聴距離[kachoukyori] audible distance
可聴度[kachoudo] audibility
聴す[yurusu] to permit
謹聴[kinchou] listening attentively

傾聴[keichou] listening closely
幻聴[genchou] auditory hallucination
公聴会[kouchoukai] public hearing
視聴[shichou] looking and listening
視聴覚[shichoukaku] senses of seeing and hearing

遠隔講義[enkakukougi] distance learning
休講[kyuukou] lecture cancellation
公開講座[koukaikouza] extension lectures
講演[kouen] lecture
講演会[kouenkai] lecture (esp. special engagement by noted speaker)

講義[kougi] lecture
講座[kouza] academic teaching unit
講師[koushi] lecturer
講習[koushuu] short course
講習会場[koushuukaijou] training center