frequency


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Related to frequency: frequency modulation, Sound frequency

frequency

 [fre´kwen-se]
1. the number of occurrences of a periodic or recurrent process in a unit of time, such as the number of electrical cycles per second measured in hertz. In cardiac pacing terminology, frequency is expressed by the formula: frequency = ½ × pulse width.
2. the number of occurrences of a particular event or the number of members of a population or statistical sample falling in a particular class.
radio frequency the range of frequencies of electromagnetic radiation between 10 kilohertz and 100 gigahertz, used for radio communication.
relative frequency the ratio of the number of occurrences of a specified phenomenon in a population to the total size of the population.
urinary frequency urination at short intervals without increase in daily volume of urinary output, due to reduced bladder capacity or cystitis.

fre·quen·cy (ν),

(frē'kwen-sē),
The number of regular recurrences in a given time, for example, heartbeats, sound vibrations.
[L. frequens, repeated, often, constant]

frequency

The number of cycles or repetitions of a periodic wave or signal per unit time. In electromagnetic radiation, frequency is usually expressed in units of hertz (Hz), where 1 Hz = 1 cycle per second.

frequency

Statistics The number of times that a particular periodic event occurs in a unit time. See Collision frequency, Cumulative frequency, Larmor frequency, Observed frequency, Order frequency, Pulse repetition, Recombination frequency, Relative frequency.

fre·quen·cy

(ν) (frē'kwĕn-sē)
1. The number of regular recurrences in a given time, e.g., heartbeats, sound vibrations.
2. acoustics the number of cycles of compression and rarefaction of a sound wave that occur in 1 second, expressed in hertz (Hz).
3. The rate of vocal fold vibration (i.e., the number of times the glottis opens and closes in 1 second) during phonation; perceived as voice pitch.
[L. frequens, repeated, often, constant]

frequency

An informal term referring to the condition in which urine is passed more often than normal (frequency of urination). Frequency may be due to excessive fluid intake, bladder infection, pregnancy, the use of DIURETIC drugs, or, in men, to an enlarged prostate gland obstructing the urinary outflow so that the bladder can only be partially emptied. Frequency is occasionally of psychological origin.

Frequency

Sound, whether traveling through air or the human body, produces vibrations—molecules bouncing into each other—as the shock wave travels along. The frequency of a sound is the number of vibrations per second. Within the audible range, frequency means pitch—the higher the frequency, the higher a sound's pitch.
Mentioned in: Abdominal Ultrasound

fre·quen·cy

(frē'kwĕn-sē)
The number of regular recurrences in a given time, e.g., heartbeats, sound vibrations.
[L. frequens, repeated, often, constant]

Patient discussion about frequency

Q. What foods or liquids, juices, proteins, fruits, are good for Male Prostate or Urinary Frequency? I am 53 YO Male with exessive urinary frequency. Is there a fruit, food, drink, pill, mojo, that would help me with this problem? I am talking about urinating 3 to 4 times every night, and or while watching TV, every hour or so. No pain, yet, an occacional after drip that is very anoying. Perhaps I have a prostate problem and should consuld with my Urologist. Yet, before I go there, does anyone know of something I can eat or drink to fix or aleviate this problem?

A. Thanks for the heads-up. One of my issues is that I LOVE coffee, thus, reducing my daily consumption of 2-3 cups could be a problem.

More discussions about frequency
References in periodicals archive ?
distinguishes the reflections of the security spectrum requiring the causal elements of "stability" (research units 2, relative frequency (1)), "cooperation" (research units 3, relative frequency (4)), "partnership" (research units 3, relative frequency (1)) and "border" (research units 3, relative frequency (3)).
Meanwhile, in one repeating cycle, the resonance exists in the early portion and the instantaneous frequency equals approximately the resonance frequency, while in the later portion, the resonance vanishes due to damping and the instantaneous frequency becomes 0.
As shown in Table II, as for flanking markers selection, genetic advance of foreground traits showed upward trend with the increase of original marker allele frequency in donor.
Frequency Resolution = 1/(1 ns/div x 10 div) = 100 MHz So this FFT could distinguish frequency components in the signal spectrum as close as 100 MHz, but any components closer than 100 MHz apart would merge together and be indistinguishable.
Where current frequency management processes require three months to replace one frequency with another, by 2021 this process will be reduced to three days.
If the power of an interfering source is below the selected threshold, the frequency it is on would still be good to use; if the interfering source is more powerful (i.e.
When, for example, a synapse was stimulated with just 10 spikes at a frequency of 30 spikes per second, it induced a far greater increase in strength than stimulating that synapse with 10 spikes at 100 times per second.
In 2015, Liberty assigned the 700 MHz broadcast frequency and the 2540-2545 MHz, 2580-2595 MHz, 2535-2540 and 2565-2580 MHz frequencies to BellTel, a subsidiary of Vega Telecommunications, Inc., it said.
He said spectrum user fees have long been imposed and collected by the National Telecommunications Commission (NTC) but with no definite system of imposition, which led to the 'hoarding' of frequency bands by the two big telco companies.
The working frequency range of modern georadars usually lies in the frequency band from 50 to 2000 MHz, which is a compromise between the depth of probing (in tens of meters) and the resolution (in tens of centimeters) [4, 5].
Different frequency characteristics can reflect the different failure processes within the rock mass [11].