| 21. | He also discovered the means to recombine separate frequencies to form a coherent audible sound.
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| 22. | The marks can then be converted into standard musical notation and, more important, audible sounds.
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| 23. | Audible sound has frequencies between 20 and 20.000 Hz.
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| 24. | Using a test method, such as manual tap testing, to produce audible sounds is not reliable.
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| 25. | The body of the guitar does not amplify the vibration of the strings into audible sound.
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| 26. | As if there faintly audible sounds of the alterations of crystals and frozen bodies are recorded.
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| 27. | The Tettigarctidae differ from other cicadas in producing vibrations in the substrate rather than audible sounds.
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| 28. | The intensity range of audible sounds is enormous.
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| 29. | The actual audible sound pitch is dependent on the POKEY clock frequency and distortion values chosen.
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| 30. | Using a similar method, researchers can detect volcanic eruptions by monitoring infra-sound sub-audible sound below 20 Hz.
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