The process of hearing

1. Sound waves impinge on tympanic membrane that vibrate accordingly.
2. The movement of the tympanic membrane are transmitted by the three ossicles to the oval window
3. This causes displacement of fluid in the vestibular canal which;
4. in turn causes movement of Reissner’s membrane.
5. Vibration of Reissner’s membrane displaces fluid in the middle canal which move the basilar membrane, thereby displacing fluid in tympanic canal
6. Displacement of the fluid in the tympanic canal is taken up by stretching of the membrane covering the round window.
7. The vibration of basilar membrane distorts the sensory cells of Organ of Corti, which fire impulses to the brain.
8. The pitch of sound is determined by the frequency of vibration of the basilar membrane determine by the frequency of sound
9. The intensity or loudness of sound is determined by the amplitude of the vibration of basilar membrane in turn determined by amplitude of sound.

Please find free downloadable notes, exams and marking guides of agriculture, biology, and chemistry from digitalteachers.co.ug website.

Dr. Bbosa Science