beat frequency

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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

beat frequency

beat frequencyclick for a larger image
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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
If sustained binaural beat frequencies resonate throughout the brain through the "frequency following response" (FFR), this can cause alterations in levels of arousal through activation of the reticular-thalamic activating system.
The first exponentials of [s.sub.if-1]([??], [t.sub.m]) and [s.sub.if- 2]([??],[t.sub.m]) in (9) are the range items which produce beat frequencies 2[gamma][R.sub.[DELTA]]/c and -2[gamma][R.sub.[DELTA]]/c, respectively.
Two horizontal tilt positions, at 90[degrees] and 270[degrees], were chosen because the differences in beat frequencies between the uppermost and lowermost comb rows are graded with tilt angle and reach a maximum at 45[degrees] through 90[degrees] deviation from vertical (Tamm, 1980, 1982).
Should a master fail, ordinary LVDT signal conditioners in a master/slave hookup will revert back to their own oscillators, subjecting them to the beat frequencies the master/slave hook up was supposed to prevent.
in megahertz) appear to interfere and produce much slower EEG "beat frequencies." Despite a century of clinical use, the underlying origins of EEG rhythms have remained a mystery.
Sensitivity and specificity values for differentiating abnormal spermatozoa from normal sperm cells at various beat frequencies are presented in Figures 3(c) and 3(d) for oligozoospermic and asthenozoospermic cases, respectively.
When [f.sub.rep] is not exactly an integral multiple of [DELTA][f.sub.rep], the predicted beat frequencies do not repeat exactly at intervals of [f.sub.rep] / [DELTA][f.sub.rep] orders, and in principle the unambiguous region can be extended.
Knowing that mackerel and eels swimming in water generate and thus experience different hydrodynamic environments, the duo simulated these different environments by varying tail beat frequencies and fluid viscosity (syrupiness).
An array of ICs can be synchronized to a system clock to eliminate beat frequencies. All three channels of the IC are equipped with short-circuit and over-temperature protection.
are the carrier and beat frequencies, and [??] = [??]/c, [??] = [??]/c.
Chair and scene motion frequencies and the resulting beat frequencies are presented in Table 1.