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Pitch Loudness and Hearing — Free MYP3 Sciences Practice Questions
1QuestionHow Amplitude Affects LoudnessConcept Practice
2 marks~3 minCriterion A
The diagram shows two sound waves produced by the same instrument. Wave X has a small amplitude and Wave Y has a large amplitude.
Explain how the amplitude of a sound wave is related to its loudness. In your answer, use the concepts of energy and loudness, and identify which wave — X or Y — produces the louder sound. [2]
Explain how the amplitude of a sound wave is related to its loudness. In your answer, use the concepts of energy and loudness, and identify which wave — X or Y — produces the louder sound. [2]
Solutions
2QuestionHow Amplitude Affects LoudnessAssessment Practice
5 marks~8 minCriterion D
A student listens to music through headphones at four volume settings and records the following data.
| Volume setting (%) | 40 | 60 | 80 | 100 |
|---|---|---|---|---|
| Amplitude (units) | 0.4 | 0.6 | 0.8 | 1.0 |
| Loudness (dB) | 70 | 80 | 90 | 100 |
a
Describe the relationship between amplitude and loudness shown in the data. [1]
b
Explain why a volume limit of 85 dB on a personal listening device helps protect a user's hearing. [2]
c
A friend argues that keeping the volume below 85 dB is enough to prevent all hearing damage. Using the data and your knowledge, analyse whether this claim is fully supported. [2]
Solutions
3QuestionHow Amplitude Affects LoudnessAssessment Practice
5 marks~8 minCriterion C
A loudspeaker produces two sound waves, Wave X and Wave Y, displayed on an oscilloscope screen. Wave X has a larger vertical displacement from the centre line than Wave Y. Both waves have the same frequency and travel through air to reach a microphone.
a
Describe what amplitude means for a sound wave and identify which wave has the greater amplitude. [1]
b
Explain why the wave you identified in part (a) produces a louder sound than the other wave. [2]
c
A student says: "Wave Y sounds quiet because it is not travelling fast enough." Interpret this statement and explain whether the student is correct, using your understanding of what actually determines loudness. [2]
Solutions
4QuestionHow Amplitude Affects LoudnessAssessment Practice
5 marks~8 minCriterion B
The table below shows the amplitude and loudness of four sound waves.
| Wave | A | B | C | D |
|---|---|---|---|---|
| Amplitude (units) | 2 | 4 | 6 | 8 |
| Loudness (dB) | 20 | 40 | 60 | 80 |
a
Describe the relationship between amplitude and loudness shown in the data. [1]
b
Calculate the loudness of wave E, which has an amplitude of 10 units. Show your working. [2]
c
A student claims that doubling the amplitude of wave E will double its loudness. Analyse the data to decide whether this claim is correct, and justify your answer. [2]
Solutions
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