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.
(i) Explain, with reasons, how a damaged tympanic membrane can affect the transmission of sound waves.
(ii) Predict what change, if any, would occur in the amplitude of vibrations reaching the cochlear fluid compared to a normal ear.
(iii) Suggest one medical or protective measure that could help the membrane heal and restore normal hearing.