| 11. | The Photonic Fence uses a non-lethal laser to track insects and monitor their wing-beat frequency.
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| 12. | By recording the beat frequency over time, a complete velocity history of the surface is obtained.
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| 13. | In order to make the carrier pulses audible in the receiver, a beat frequency oscillator is used.
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| 14. | One function of the Johnston s organ is for detecting the wing beat frequency of a mate.
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| 15. | The low-frequency beat frequency of the superimposed scatter radiation which corresponds to the Doppler frequency " f"
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| 16. | By using sources of several wavelengths to generate sum and difference beat frequencies, absolute distance measurements become possible.
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| 17. | Beat frequency obtained from the interference of a 193.4 THz EM wave with a 193.40032 THz EM wave.
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| 18. | In physics-speak, the moire effect is " a beat frequency between two other frequencies creating an interference pattern,"
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| 19. | This beat frequency is slow enough that it can be monitored with a simple photo-detector and high speed oscilloscope.
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| 20. | First, Heterodyned signals are beat frequencies between the signal source and a reference source ( dubbed local oscillator LO ).
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