Mean free path: Difference between revisions
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Mean free path determines the largest frequency that can possibly propagate in a gas. Any larger frequencies will not propagate, owing to the fact that molecules will not transfer the pressure wave. | Mean free path determines the largest frequency that can possibly propagate in a gas. Any larger frequencies will not propagate, owing to the fact that molecules will not transfer the pressure wave. | ||
In air at STP, mean free path is about 68 nm. Together with 340 m/s sound speed, this gives a maximum of 5 GHz of frequency. If there is a species which can hear this high of a sound, the maximum EDO which can be applied will be defined by the species' lowest frequency, or the place where the difference between rhythm and pitch occurs. | In air at <abbr title="Standard temperature and pressure ">STP</abbr>, mean free path is about 68 nm. Together with 340 m/s sound speed, this gives a maximum of 5 GHz of frequency. If there is a species which can hear this high of a sound, the maximum EDO which can be applied will be defined by the species' lowest frequency, or the place where the difference between rhythm and pitch occurs. | ||
If the beat rate is less than the lowest frequency,beats are distinct, and the interval sounds like a "wahwah" instead of a true sound pair. | If the beat rate is less than the lowest frequency,beats are distinct, and the interval sounds like a "wahwah" instead of a true sound pair. | ||