The length of the air column determines the resonant frequencies. The mouth or the reed produces a mixture if different frequencies, but the resonating air column amplifies only the natural frequencies. The shorter the tube the higher is the pitch. When the length of the straw changes the sound or pitch changes. Pitch is how high or low a sound is perceived. We made 4 different length straws with different pitches. The longer the straw the lower the pitch – the shorter the straw the higher the pitch.
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Answer:
The length of the air column determines the resonant frequencies. The mouth or the reed produces a mixture if different frequencies, but the resonating air column amplifies only the natural frequencies. The shorter the tube the higher is the pitch. When the length of the straw changes the sound or pitch changes. Pitch is how high or low a sound is perceived. We made 4 different length straws with different pitches. The longer the straw the lower the pitch – the shorter the straw the higher the pitch.
Explanation:
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