5. JD is setting a bucket of water on the ground.

Ifound this on google “your outer ear collects sound waves and reflects them into a tiny tube called the ear canal. at the end of the ear canal is a thin, skin-like membrane stretched tightly over the opening, called the eardrum.” i hope this you for what your looking for

This is what a calorimeter is used for simpler ex, to measure calories in food.

The anwser is: wave a has a greater pitch and frequency.