frequency

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

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]
Medical Dictionary for the Dental Professions © Farlex 2012

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
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References in periodicals archive ?
Therefore, the null hypothesis of no relationships between the observed frequency and the expected frequency is rejected, showing a relationship between systems thinking and the use of ICTs in faculties and departments of physical education and sports sciences of Isfahan.
which is the observed frequency of the events [RS[I.sup.(n).sub.(n+i)[delta]] [member of] [GAMMA]] (i = 0, 1, ..., N).
TABLE 6 Correlations Between Educator's Ratings and Observed Use of Print Referencing Keywords, Alphabet Letter Names, and Alphabet Letter Sounds Educators' Ratings on Rating Scale Items (N = 20) Keywords (b) Letters (c) Observed frequency of: (a) Print referencing r = .227, p = .168 keywords Alphabet letter names r = .381 *, P = .049 Alphabet sound names Educators' Ratings on Rating Scale Items (N = 20) Sounds (d) Observed frequency of: (a) Print referencing keywords Alphabet letter names Alphabet sound names r = .405*, P = .038 * Correlation is significant at the 0.05 level (one-tailed).
Table 5 in the online Data Supplement also presents the maximum observed background noise along the amplicon sequence (determined by the maximum observed frequency of an aberrant nucleotide call), the mean noise (the mean observed frequency of aberrant calls within the amplicon), and the sequence depth (the number of aligned paired-end sequence reads).
This results in two equations from which the frequency f could be eliminated and the system solved for V supposed constant and [f.sub.-[infinity]] is the observed frequency before the aircraft over flight and [f.sub.+[infinity]] after the over flight.
In Section 2 a model referring observed frequency shift of Pioneer spacecraft signals to purely relativistic reasons is regarded; some quantitative assessments are made as well as conclusions on ability of the model to explain the anomaly.
Their relative observed frequency (abundance), calculated through the Holtzman equation is given in Tables 5 and Figure 3.
Significance tests are based on hyper-geometric probability estimates (see Bergman & El-Khouri, 1987); * = Observed frequency smaller than expected by chance alone (p < .001); ([dagger]) = Observed frequency larger than expected by chance alone (p < .001).
The standardized residuals were calculated as the difference between the predicted and observed frequency divided by the square root of the predicted frequency.
The isotopic molecular species, assigned quantum numbers, observed frequency, estimated measurement uncertainty, and reference are given for each transition.