| 1. | Experiments were performed over the entire range of audible frequencies ( Greenwood 1961a ).
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| 2. | Using audible frequencies makes more sense, says the QinetiQ specialist.
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| 3. | The audible frequency range for young humans is about 20 Hz to 20 kHz.
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| 4. | On " Superorganism ", musicians singing and playing instruments such as EEG cap into audible frequencies.
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| 5. | Audible frequencies are 20 Hz to 20 kHz.
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| 6. | In effect, the pulse length gets noise shaper which has lower noise in the audible frequency range.
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| 7. | If these pressure waves are strong enough and within the audible frequency spectrum, a sensation of hearing is produced.
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| 8. | So, to make audible frequencies, the " shape " of the dynamic system, along a closed path, is scanned periodically.
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| 9. | One such source, capable of vibrating at audible frequencies ( 45 to 20, 000 vibrations per second ) is plasma.
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| 10. | This effect cannot be achieved with conventional loudspeakers, because sound at audible frequencies cannot be focused into such a narrow beam.
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