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Questions and Answers
What is the unit of measurement for the amplitude of a sound wave?
What is the visual representation of amplitude on a graph of a sound wave?
What is the effect of increasing the frequency of a sound wave on its pitch?
What is the range of frequencies that humans can hear?
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What is the effect of decreasing the amplitude of a sound wave on its loudness?
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Study Notes
Sound
Amplitude
- Measures the loudness or intensity of a sound wave
- Represented by the symbol "A" and measured in decibels (dB)
- Higher amplitude = louder sound
- Lower amplitude = softer sound
- Can be visualized as the height of a sound wave on a graph
Frequency
- Measures the number of oscillations or cycles of a sound wave per second
- Represented by the symbol "f" and measured in hertz (Hz)
- Higher frequency = higher pitch
- Lower frequency = lower pitch
- Can be visualized as the number of peaks or troughs of a sound wave on a graph
- Human audible frequency range: 20 Hz to 20,000 Hz
Sound
Amplitude
- Loudness or intensity of a sound wave is measured by amplitude, represented by "A" and measured in decibels (dB)
- Amplitude determines the loudness of a sound, with higher amplitude resulting in a louder sound and lower amplitude resulting in a softer sound
- Visual representation of amplitude on a graph is the height of a sound wave
Frequency
- Number of oscillations or cycles of a sound wave per second is measured by frequency, represented by "f" and measured in hertz (Hz)
- Frequency determines the pitch of a sound, with higher frequency resulting in a higher pitch and lower frequency resulting in a lower pitch
- Visual representation of frequency on a graph is the number of peaks or troughs of a sound wave
- Human audible frequency range spans from 20 Hz to 20,000 Hz
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Description
Understand the fundamentals of sound waves, including amplitude and frequency, and how they relate to loudness and pitch.
