Loudness and Pitch
Loudness depends mainly on amplitude of vibration, while pitch depends mainly on frequency of vibration.
Concept Practice Coming SoonMain explanation
Teacher explanation
A sound with larger amplitude carries more energy and is heard as louder. A sound with higher frequency is heard as shriller or higher-pitched. Loudness and pitch are different qualities, so a sound can be loud but low-pitched, or soft but high-pitched.
Example
A drum beaten harder sounds louder because its membrane vibrates with greater amplitude, while a whistle sounds high-pitched because it has high frequency.
Simple analogy
Amplitude for amount of sound; frequency for fineness of note.
Common confusion
Students often write that a louder sound always has higher pitch. Loudness and pitch depend on different wave characteristics.
Exam tip
For loudness mention amplitude; for pitch mention frequency. Do not interchange them in one-mark answers.
Answer writing and exam use
1-mark use
Write the exact meaning of loudness and pitch in one clean line.
2-mark use
Define loudness and pitch and add one example or condition.
3-mark use
Explain loudness and pitch, show the method or example, and mention the common mistake.
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