Key Idea.
Section 1
Wave Amplitude Determines Sound Volume
Every sound wave has measurable properties that determine how it is perceived. One key property is amplitude, which refers to the "height" or intensity of the wave.
Physically, amplitude represents the amount of energy the wave is carrying. A wave with high energy pushes particles harder, creating a large amplitude.
Section 2
Visual Models Define Wave Amplitude
In a visual waveform model (a graph of the wave), amplitude is measured as the vertical distance from the center line (rest position) to the highest point (peak) of the wave.
This visual height is a direct representation of the wave's strength. A tall wave on the graph represents a high-energy sound; a short, flat wave represents a low-energy sound.
Section 3
Wave Amplitude Changes Sound Volume
The physical property of amplitude corresponds directly to the perceptual quality of volume (loudness). Because amplitude measures energy, a wave with a large amplitude delivers more energy to the ear, resulting in a loud volume. Conversely, a wave with a small amplitude delivers less energy, perceived as a quiet volume.
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Section 1
Wave Amplitude Determines Sound Volume
Every sound wave has measurable properties that determine how it is perceived. One key property is amplitude, which refers to the "height" or intensity of the wave.
Physically, amplitude represents the amount of energy the wave is carrying. A wave with high energy pushes particles harder, creating a large amplitude.
Section 2
Visual Models Define Wave Amplitude
In a visual waveform model (a graph of the wave), amplitude is measured as the vertical distance from the center line (rest position) to the highest point (peak) of the wave.
This visual height is a direct representation of the wave's strength. A tall wave on the graph represents a high-energy sound; a short, flat wave represents a low-energy sound.
Section 3
Wave Amplitude Changes Sound Volume
The physical property of amplitude corresponds directly to the perceptual quality of volume (loudness). Because amplitude measures energy, a wave with a large amplitude delivers more energy to the ear, resulting in a loud volume. Conversely, a wave with a small amplitude delivers less energy, perceived as a quiet volume.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter