What decided the loudness of a soundwave??
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The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound. ... The vibration of a source sets the amplitude of a wave. It transmits energy into the medium through its vibration.
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The loudness of sound is determined, in turn, by the intensity, or amount of energy, in sound waves. The unit of intensity is the decibel (dB). As decibel levels get higher, sound waves have greater intensity and sounds are louder.
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