beat frequency

Also found in: Acronyms.

beat frequency

[′bēt ‚frē·kwən·sē]

(electronics)

The frequency of a signal equal to the difference in frequencies of two signals which produce the signal when they are combined in a nonlinear circuit.

beat frequency

The periodic variation in amplitude of an oscillation resulting from the superimposition (or mixing) of two oscillations of differing frequencies. It is equal to the difference between the two frequencies.

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References in periodicals archive ?

Influence of culture duration and ciliogenesis on the relationship between ciliary beat frequency and temperature in nasal epithelial cells.

Nasal mucosa and mucociliary changes in extreme hot and dry weather in the deserts

Beat frequency of a comb row was determined by following the upright stage of the beat cycle (midway through the effective stroke) of a single comb plate (Fig.

Functional consequences of the asymmetric architecture of the ctenophore statocyst

The hyperactivated flagellar movement can be easily distinguished from the activated flagellar movement by its large bending and slow beating; namely, the activated spermatozoa had symmetrical flagellar movement with high beat frequency and small amplitude (Fig.

[Ca.sup.2+] and cAMP regulations of microtubule sliding in hyperactivated motility of bull spermatozoa

That is quite a lot for hummingbirds because they hardly change their wing beat frequency," Sapir said.

Flying backward 'easy for hummingbirds'

CEO] (typically 20 MHz, or 40 MHz after frequency doubling to the visible) and the beat frequency [f.

An optical frequency comb tied to GPS for laser frequency/wavelength calibration

This capability eliminates the effects of spurious beat frequency signals, cross talk, and intermodulation.

LVDT signal conditioner

The beat frequency, near 8 kHz, is consistent with a slight difference in frequency between interior and exterior units in the 19 x 28 sensor array; that frequency difference can be explained by a small difference in their spring lengths, possibly influenced by difference in anchor rigidity.

Damping, noise, and in-plane response of MEMS acoustic emission sensors

One of the ways to find the beat frequency is to use a photodetector in a point of the region of interference of the two waves.

Much Ado about Nil: reflection from moving mirrors and the interferometry experiments

The numbers can be used to calculate an animal's flying or swimming speed based on a count of its beat frequency and its estimate of wingspan.

Wingbeat mathematics

In the CW mode, when the altimetric beat frequency becomes equal or greater than its maximum corresponding to the critical altitude [H.

An aircraft single-antenna FM radio altimeter. (Technical Feature)

Measurements from the graph were used to determine the beat frequency.

Measurements of sound waves and inference

This enables one to obtain the maximum resolution of details, (ii) for large deformation intervals, the beat frequency or beat period (inverse creep rate) was measured by a timer and plotted as a function of strain.