A child accidentally suffers a small tear in the tympanic membrane (eardrum). Soon after, the child complains that soft sounds are difficult to hear, while louder sounds are still audible.
a. (i) Explain, with reasons, how a damaged tympanic membrane can affect the transmission of sound waves.
b. (ii) Predict what change, if any, would occur in the amplitude of vibrations reaching the cochlear fluid compared to a normal ear.
c. (iii) Suggest one medical or protective measure that could help the membrane heal and restore normal hearing.