Which characteristic of a sound wave determines its LOUDNESS?
AWavelength
BAmplitude
CSpeed
DFrequency
Answer & Solution
Correct answer: B. Amplitude
Loudness depends on amplitude. Larger amplitude means particles in the medium are displaced further from their rest position, carrying more energy, and the listener perceives the sound as louder. Frequency determines pitch (high pitch = high frequency), not loudness.
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