How do we hear, speak and make music? - Sound waves: stimulus for audition - Physical properties of sound waves
3 important questions on How do we hear, speak and make music? - Sound waves: stimulus for audition - Physical properties of sound waves
Frequency and pitch perception
The rate at which sound waves vibrate is measured as cycles per second, or hertz (Hz). Low frequency is low-pitched, high frequency is high-pitched.
Amplitude and perception of loudness
Intensity of sound is usually measured in decibels (dB). Is about the height of a sound wave. High amplitude is loud, low amplitude is soft.
Complexity and timbre (perception of sound quality)
Unlike the pure tone of a tuning fork, most sounds are a mixture of frequencies. A sound's complexity determines its timbre, allowing us to distinguish, for example, a trombone from a violon playing the same note.
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