Two further open-ended questions, Q6 and Q14, addressed prior ideas regarding the relationship between pitch and frequency, such as the number of vibrations per second produced in the eardrum.
Example (Q14): A single musical instrument, e.g. a trumpet, emits a high-pitched sound followed by a low pitched one. What is the difference between the types of vibrations these sounds produce in our eardrum?
Questions Q7 and Q8, also open-ended, addressed prior ideas regarding the dependence of sound frequency on the
distance travelled (Q7) and on sound intensity (Q8). These two aspects are related, as seen in the answers obtained.
Example (Q8): The same drum from the last question is given a gentle hit and then a hard one. The first sound will be soft and the second one loud. If, when generating the first sound, the drum head vibrates 80 times a second, state whether it produces more, the same number or fewer