| 11. | There was no audible sound once the aircraft had passed over.
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| 12. | The ultrasonic devices achieve high directivity by modulating audible sound onto high frequency ultrasound.
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| 13. | A frequency over 30 Hz will produce an audible sound.
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| 14. | Whistling kettles emit an audible sound as the water boils.
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| 15. | Some implementations even included audible sounds interspersed with the data.
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| 16. | It can be associated with presence of audible sound when clenching or grinding the teeth.
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| 17. | Note that the wavelengths in audible sound are much longer than those in visible light.
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| 18. | Interaction with the surrounding air causes audible sound waves, which travel away from the instrument.
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| 19. | Signals are analysed by a software fast Fourier transform algorithm and converted into audible sound.
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| 20. | It's the Audible sound of a great idea coming.
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