171 P1: 中耳機制說明:twomuscles on ossicles(connect eardrum & cochlea),削弱小骨震動= 降低內耳接收 P2: 中耳特點說明:skeletalmuscles, automatically(reflexively)> thus giving foundation of hearingdisorders and neuro logical conditions(因為會反射性做減弱動作) P3: time for functioning:除了外在聲,還有自己發聲時
Reason:自己發出聲音時跟外在聲音依樣可造成傷害&衝擊,avoidsystem from getting fatigue, interference, and potential injury P4: other function- muffle lower frequency= frequencyselectivity> improve hearing sounds that contain many high-frequency components P5: analogy- birds’ hearing system: intricate system(stapediusq) outside from the middle-ear cavity: easily research |