frequency

(redirected from frequencies)
Also found in: Dictionary, Thesaurus, Encyclopedia.

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 ?
The petition stated that while Liberty was no longer engaged in broadcasting business, "and despite the underutilization or, worse, non-utilization at all of the conditionally assigned said frequencies within the prescribed period, respondent Liberty continued to illegally hoard the said 700 MHz broadcast frequency."
'By breaking the control of the two players over the country's frequencies, we increase competition and welcome new players.
Despite Congress' power to issue a legislative franchise to a third player, the two major players have effectively prevented the entry of competition by cornering most of the frequencies given out by the government.
Providing high technical parameters (speed, resolving power, and range of synthesized frequencies), the considered variants of realization of the channels for the formation of signals of georadars with a synthesized aperture based on hybrid frequency synthesizers have insufficient spectral purity of the synthesized signals.
The NSS_Albania reveals that the relative frequencies in the field of international, regional and national security are significant (more than 195 uses of the concepts of "security" and "strategy" and a relative frequency of .41).
Given the gear configuration and running speed, the planetary gear set characteristic frequencies can be calculated [20, 21], as listed in Table 2.
The trend of foreground traits genetic advances between different original marker allele frequencies was shown in Table II.
The CEO of Vodafone Egypt, Stefano Gastaut, said that the 5 MHz are sufficient for the company besides the existing frequencies owned by the company to provide good quality 4G services .
Mig Cardamone adds, "For example, if you know that the radio microphones at your event will only be used at very short distances from the receivers, you could put the threshold higher, recalculate the frequency set-up and thus win more usable frequencies."
"To our surprise, we found that beyond the optimal frequency, synaptic strengthening actually declined as the frequencies got higher."
Paul national data) and the unemployment rate that existed three years prior to those reported frequencies. Graph 4 shows the resulting fitted equation.