GCSE Physics

Sound Volume

The louder a sound, the more energy it has. This means loud sounds have a large amplitude. Think about what an amplifier does: it makes sounds louder. It is the amplitude that relates to how loud sound is.

The waveform on the left has a smaller amplitude, but the same number of peaks in a given time (frequency). The only difference between the sounds is that the first one is quieter, as it has less energy.

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