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Longman Dictionary of Contemporary English
▪ Here is the wavelength and is the angular frequency of the wave.
▪ The sequence generator produces the phase control signals and is triggered by step command pulses from a constant frequency clock.
▪ Radio used for communication uses a constant frequency carrier with some kind of amplitude modulation.
▪ The stepping rate is fixed by a constant frequency clock, which is controlled by a one-bit signal from the microprocessor.
▪ Below a certain critical frequency no electrons were ejected, however intense the radiation.
▪ When m 0.6, the input resistance remains close to for frequencies up to 85% of the critical frequency.
▪ Making the characteristic impedances of the constant-k and m-derived filter sections identical also ensures that their critical frequencies are the same.
▪ They also adversely affect the rate at which the attenuation changes with frequency near critical frequencies.
▪ The parameter m is often chosen to be 0.3 which separates the resonant frequency by about 5% from the critical frequency.
▪ The m-derived section is arranged to exhibit the same characteristic impedance and critical frequency or frequencies as the prototype.
▪ All we can say in general is that there is a critical frequency, a knife-edge.
▪ These levels vibrate at different frequencies.
▪ It may be possible to identify two or more teaching styles based on different frequencies of use of the activity groups.
▪ Another amazing fact is that crystals actually vibrate at different frequencies when they come into contact with other energy fields.
▪ They occupy a variety of different sites and orientations; molecules in different sites absorb at different frequencies.
▪ The periods differ, so the buildings vibrate with different frequencies and slap against each other.
▪ It is preferable to treat different samples with different frequencies and amplitudes of vibration.
▪ Dispersive instruments use prisms or gratings to separate radiation of different frequencies, by refraction or diffraction.
▪ We might say we perceive them as separate because they vibrate at different frequencies.
▪ It only differs from the category 1 species in the greater frequency of occurrence of digestion.
▪ And non-poor unmarried women are deciding to have and keep their babies with far greater frequency than in previous eras.
▪ This coincided with a greater frequency of direct attacks in harem takeovers.
▪ Earhart left, invitations to dine with Millie Otis in the state dining room came with greater frequency.
▪ When I was a small boy, quite serious fires seemed to occur in Salisbury with great frequency.
▪ The same rhetoric appears with great frequency in the description of the football scene.
▪ Prevalent winds are those which blow with the greatest frequency at any place.
▪ We have found no greater frequency of complaints of seasonal allergic-type symptoms in oilseed rape than in non-oilseed rape rural areas.
▪ Sports participants have much higher frequencies of participation than do participants in other leisure activities such as the arts.
▪ Sometimes it shows up as a lot more wiggles in the higher frequency range, up around 25 to 70 Hertz.
▪ As age increases, the inner ear becomes less sensitive to high frequencies.
▪ In diamond, the chemical bonds are strong, favouring high frequencies of vibration.
▪ Digital mobiles witter noisily at high frequencies.
▪ The high frequency vibrations were so highly favoured that an infinite amount of energy would be present in them.
▪ Very high frequency direction finding is an aid to navigation.
▪ The high frequency of I as theme helps to maintain a sense of continuity and a coherent point of view.
▪ The issue is to estimate the marginal benefit from the increased frequency of screening examinations against the marginal increased cost.
▪ As some kidney cancers cause hypertension an increased frequency of kidney cancer is to be expected in a hypertension clinic.
▪ Impaired awareness of warning symptoms in patients transferred from animal insulins has been reported, risking increased frequency of severe hypoglycaemia.
▪ Consider the physiologist's intuition that an increased neuronal firing frequency explains increased intensity of experience.
▪ The increased frequency of malignant disease in this population is of importance in view of the major impact on overall management.
▪ A problem arises with the design of such filters for passing or stopping low frequencies.
▪ How can we reconcile the low frequency of expressions of emotional involvement in election campaigns with the high frequency of antagonistic partisanship?
▪ Between these two maxima there is a lower frequency of depths representing the more shallow regions of the oceans.
▪ Like Pro Logic, it has three discrete front channels and a separate channel for low frequencies from the subwoofer.
▪ Band filters that can be tuned down to low frequencies are useful in a host of applications including electronic oscillators.
▪ White noise is not a good simulator of music, which contains more energy at low frequencies than at high ones.
▪ The cause is not signal splatter; the noise which annoys the deaf is at a much lower frequency.
▪ However, the weaker the magnetic field, the lower the frequency needed for a given ion mass.
▪ A gravitational wave at the natural frequency for longitudinal oscillations of the bar would set it ringing like a tuning fork.
▪ This amounts to a relative frequency decline of over 50%.
▪ Many causes of hyperuricemia have been recognized; however, gouty arthritis is seen with relative frequency in only a few conditions.
▪ The relative frequencies of citations may be inaccurate, if allowance is not made for the growth of the literature.
▪ It can also be seen that there is a negligible relationship between relative frequency and coverage.
▪ This can be done by comparing the relative frequency of use of different coding categories in the potential risks and description conditions.
▪ In computer indexing, this will involve statistical analysis of the relative frequency of occurrence of terms.
▪ Spearman's Rank-Order Correlation Coefficient was calculated to determine the correlation between relative frequency and coverage.
▪ The population will thus evolve, and the relative frequencies of different strategies will change.
▪ The reflected signal is studied as a function of frequency and the resonant frequency, together with higher orders, is then measured.
▪ A range of frequencies wide enough to ensure that it encompasses the resonant frequency of the sample v r is then examined.
▪ The resonant frequency is detected as the maximum of a graph of amplitude against frequency.
▪ A cyclotron is fine-tuned to a resonant frequency specific to one chosen ion type.
▪ Table 1 shows the resonant cyclotron frequencies of single ions of different forms when subject to the steady geomagnetic field.
▪ The presence of other ions may raise the resonant frequency by up to 50%.
▪ The parameter m is often chosen to be 0.3 which separates the resonant frequency by about 5% from the critical frequency.
▪ Similarly, pull-shifting the treble control lifts the operational frequency band and, again, moves the midrange automatically to compensate.
▪ In the observed spectrum we find that several low frequency bands shift on deuterium substitution.
▪ In this case high frequencies means anything above approximately half the clock frequency.
▪ Faster operating speeds can be obtained with a higher clock frequency and more stages of pulse deletion.
▪ Parsytec reckons the tests it has done on lower clock frequencies point to a six- to ten-fold performance increase over the T805.
▪ Find the frequency distribution over years of study in 1991.
▪ The full array of such fractions, comprising a frequency distribution across all cultures sampled, is called an ethnographic curve.
▪ Using the unit cumulative normal frequency distribution we may compute confidence limits for our estimate of beta.
▪ It was assumed that any erosion terraces would show as modes in the frequency distribution.
▪ The plotting of frequency distributions of particular size ratios provides peaks which represent preferred forms.
▪ On the size frequency distribution plot the highest point on the curve provides the modal value.
▪ Method: A number of documents related to the domain of banking were collected, and a frequency distribution produced.
▪ The product is the result of an agreement signed in October 1991 for joint development of an FRAM-compatible radio frequency transponder chip.
▪ The latest is an outpatient procedure with a new gizmo that removes throat tissues with radio frequencies.
▪ They also found a piece of paper with the radio frequencies used by police locally and nationally, said Mr Cornwall.
▪ She wanted tactical call signs, authentication codes, radio frequencies.
▪ Radiation in the optical range and at radio frequencies can be detected either locally or at Earth stations.
▪ The technology handles multiple calls on a single radio frequency by separating them in time.
▪ The observed profiles were cross-correlated with a standard pulse profile appropriate for each radio frequency to obtain accurate pulse arrival times.
▪ It then encodes them and transmits the conversation over a range of radio frequencies.
▪ The world's first machine capable of recording the full frequency range of the human ear.
▪ Then the computer sorts all the surnames into what we call frequency ranges.
▪ The treble, middle and bass controls each have a secondary function to enhance their particular frequency ranges.
▪ Sometimes it shows up as a lot more wiggles in the higher frequency range, up around 25 to 70 Hertz.
▪ With care, about 12 harmonics may be obtained so that about an order of magnitude of frequency range is available.
▪ They operate in the same frequency range of the radio spectrum as analog cellular -- around 800 megahertz.
▪ Hazardous frequency range Cyclotron resonance by my theory only occurs if the hazardous frequency range lies with the exciting field.
▪ There was a reduction in her stool frequency, an improvement in her abdominal pain, and a less productive cough.
▪ Differentiation between remission/mild and moderate disease is mostly a function of stool frequency.
▪ To evaluate this parameter independently the mean stool frequency was calculated for each group at entry and during the study.
▪ High stool frequency, imperfect continence or the use of anti-diarrhoeal drugs was similar in all three groups.
▪ Median hospital stay, however, was the same and stool frequency in those with a functioning pouch were comparable.
▪ Most often the intervention did not change stool frequency or stool consistency, or both.
▪ Ground-state vibration frequencies are obtained as shifts from the exciting frequency or from the vibrational origin of the electronic band.
▪ Indeed, no relationship between the vibration frequencies of different molecules is logically necessary.
▪ We have seen how the vibration frequencies may be observed and how each may be allocated to a particular symmetry species.
▪ Molecular vibrations therefore lead to oscillations of electric charge, with frequencies governed by the normal vibration frequencies of the system.
▪ As we have seen in Section 5.12, isotopic substitution can lead to changes in vibration frequencies.
▪ The minimum in the potential function is at a greater internuclear distance, and the vibration frequency is lower.
▪ The random differences in environment result in a range of different vibration frequencies, and so each vibration band is broadened.
▪ Monitoring would be based on the frequency of access to files, and the archiving policies of different types of information items.
▪ It may be possible to identify two or more teaching styles based on different frequencies of use of the activity groups.
▪ Preferences for partners are probably based on the frequency of reciprocation.
▪ To improve the efficiency of the analysis each rule in the grammar is ordered based on its frequency of use.
▪ R1 and C set the oscillator's frequency range, and R2 determines the circuit's frequency shift.
▪ The topographical setting of an urban area can increase the frequency and severity of adverse meteorological conditions.
▪ Personal secrets have turned into public issues and, with increasing frequency, public scandals.
▪ Sneezing comes early and with increasing frequency.
▪ Nevertheless, teachers may improve their effectiveness by increasing the frequency of positive responses while reducing the negative.
▪ As the wine took hold I glanced in her direction with increasing frequency, often to find her already looking at me.
▪ Anxiety and despair broke through it with increasing frequency.
▪ Another mechanism, called transposition, can also increase the frequency of one variant through the genome.
▪ It was, in other words, the kind of book you encounter with increased frequency as you move through college.
▪ You can measure the frequency of these sorts of behavioural anomalies.
▪ Each station will measure the amplitude, frequency and duration of ground vibrations.
▪ These signals may have been less predictive of the outcome because they occurred at higher frequencies at earlier stages in the conflicts.
▪ One-gigaton impact explosions occur with a frequency of one per ten thousand years.
▪ Hazardous frequency range Cyclotron resonance by my theory only occurs if the hazardous frequency range lies with the exciting field.
▪ The largest, a 103-megaton blast, occurs with an average frequency of one per two thousand years.
▪ Because of the way in which adults respond to infants, these early vocalisations occur with increasing frequency.
▪ An operant is a piece of behaviour which has a spontaneous nature which occurs at a predetermined frequency.
▪ Such private dealings, however, are not likely to occur with any frequency in modern solicitors' partnerships.
▪ Leakage occurred with equal frequency in both groups.
▪ It would seem reasonable to assume that measures aimed at treating calculi in these patients may reduce the frequency of infection.
▪ It may reduce the frequency and severity of colds.
▪ Their aim was then to reduce both frequency and duration.
▪ Should the government reduce the actual frequency of tragedies, or should it simply make them less painfully obvious?
▪ When safe levels are attained consistently you may reduce the frequency of testing to once a week.
▪ As it grows older, you will probably have to reduce the frequency of feeds to one or two meals every day.
▪ Monitor and record the vital signs, reducing the frequency as the patient's conditions stabilizes.
▪ To reduce the frequency of use of this procedure two key areas in primary care could be addressed.
▪ All have shown that the frequency of ventricular ectopic at this time is low.
▪ Clinical tests have shown this frequency gives the best balance between thorough cleaning and personal comfort.
▪ A possible list of management information, showing frequency and circulation, is given overleaf.
▪ The whelks may show frequency independent selection, choosing their favourite food regardless of that species' relative abundance. 2.
▪ Languages vary tremendously in the type of conjunctions they prefer to use as well as the frequency with which they use such items.
▪ The system uses a sliding frequency guiding filter to regulate the speed of the soliton waves.
▪ Radio used for communication uses a constant frequency carrier with some kind of amplitude modulation.
▪ Instead, each airline was to be allowed to use its discretion as to frequency and capacity within reasonable grounds.
▪ No more than a few hundred of these are used with any frequency.
▪ The method has been used to study the frequency and temperature dependence of viscoelastic moduli for many years.
▪ All Governments use guillotines, but no Government have used them with the frequency of this Administration.
▪ Crimes of this type are happening with increasing frequency.
▪ Divorces are being initiated with more frequency by women.
▪ The frequency of mining accidents has steadily decreased over the past 20 years.
▪ The high frequency of cases of diarrhoea is attributable to poor food hygiene.
▪ In many cases such measurements may not be available with spatial and temporal sampling frequencies that meet the demands of research programmes.
▪ It can also be seen that there is a negligible relationship between relative frequency and coverage.
▪ It may be possible to identify two or more teaching styles based on different frequencies of use of the activity groups.
▪ Listeners used two crystal sets tuned to the corresponding frequencies.
▪ Since then, police have been listening in to the frequency used by the gang.
▪ The frequency with which they make them varies.
▪ The transmitter offers thousands of radio frequency coded options for maximum security.
The Collaborative International Dictionary

Frequency \Fre"quen*cy\, n.; pl. Frequencies. [L. frequentia numerous attendance, multitude: cf. F. fr['e]quence. See Frequent.]

  1. The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.

    The reasons that moved her to remove were, because Rome was a place of riot and luxury, her soul being almost stifled with, the frequencies of ladies' visits.

  2. A crowd; a throng. [Obs.]
    --B. Jonson.

Douglas Harper's Etymology Dictionary

1550s, "state of being crowded" (now obsolete); 1640s, "fact of occurring often;" from Latin frequentia "an assembling in great numbers, a crowding; crowd, multitude, throng," from frequentem (see frequent). Sense in physics, "rate of recurrence," especially of a vibration, is from 1831. In radio electronics, frequency modulation (1922, abbreviated F.M.) as a system of broadcasting is distinguished from amplitude modulation (or A.M.).


n. 1 (context uncountable English) The rate of occurrence of anything; the relationship between incidence and time period. 2 (context uncountable English) The property of occurring often rather than infrequently. 3 (context countable English) The quotient of the number of times n a periodic phenomenon occurs over the time t in which it occurs: f = n / t. 4 (context statistics English) number of times an event occurred in an experiment (absolute frequency)

  1. n. the number of occurrences within a given time period (usually 1 second); "the frequency of modulation was 40 cycles per second" [syn: frequence, oftenness]

  2. the ratio of the number of observations in a statistical category to the total number of observations [syn: relative frequency]

  3. the number of observations in a given statistical category [syn: absolute frequency]


Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example, if a newborn baby's heart beats at a frequency of 120 times a minute, its period—the time interval between beats—is half a second (that is, 60 seconds divided by 120 beats). Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio ( sound) signals, radio waves, and light.

Frequency (film)

Frequency is a 2000 American science fiction thriller drama film. It was co-produced and directed by Gregory Hoblit and written and co-produced by Toby Emmerich. The film stars Dennis Quaid and Jim Caviezel as father and son, Frank and John Sullivan respectively. It was filmed in Toronto and New York City. The film gained mostly favorable reviews following its release via DVD format on October 31, 2000.

Frequency (video game)

Frequency is a music video game developed by Harmonix and published by SCEA. It is the first major release from Harmonix. It was released in November 2001. A sequel titled Amplitude was released in 2003.

Frequency (disambiguation)

Frequency refers to how often an event occurs within a given period.

Frequency may also refer to:

Frequency (statistics)

In statistics the frequency (or absolute frequency) of an eventi is the number n of times the event occurred in an experiment or study. These frequencies are often graphically represented in histograms.

Frequency (Nick Gilder album)

Frequency by Nick Gilder was released in 1979 on the Chrysalis record label.

Frequency (IQ album)

Frequency is a studio album by the British neo-progressive band IQ, released in late May 2009. It was the first album recorded with new band members Andy Edwards (drums) and Mark Westworth (keyboards). A special edition with a bonus DVD was also released. This DVD contains a recording of the concert performed on 1 December 2007 at De Boerderij in Zoetermeer, the Netherlands.

Frequency (gene)

Frequency (frq) is a gene that encodes the frequency protein (FRQ) found in the '' Neurospora crassa ''circadian clock. FRQ plays a key role in the auto regulatory transcription-translation negative feedback-loop (TTFL), which generates daily rhythms in gene expression.

Frequency (company)

Frequency is a service that aggregates free-to-watch online video from multiple platforms into channels in a single application. Apps are available for free on mobile devices, personal computers and connected televisions.

Frequency (TV series)

Frequency is an upcoming drama series set to air on The CW in 2016. Inspired by the 2000 Gregory Hoblit film of the same name, Frequency is created by Supernatural and Being Human veteran Jeremy Carver. The pilot is directed by Brad Anderson. The series is set to premiere on October 5, 2016.

Usage examples of "frequency".

If an advertiser commits to a plan, it receives a certain frequency for a reduced cost.

Frequency: the number of times the target market has the opportunity to witness your advertising message during a defined period of time.

Morris reached inside his vest to his radio and switched frequencies so that he was on the channel that Stinky was using back in the aft escape trunk.

Without the interfering strands hanging in her eyes she was better able to see to her task and her fingers moved with agile speed and efficiency even though the blood continued to ooze, though with much less frequency as the wound was stitched closed.

As, however, the sexton with growing frequency overslept himself, the Archdeacon preferred to keep the key of the church himself, and it was with this in his hand that he came to the west door about half-past six the next morning.

He spoke of these things to Susan Bates with such an increasing frequency and insistency as almost to transfer the rack of them from his own brain to hers.

There is a major spike in the lower frequencies, almost like the power absorption curve of a biaxial shield generator.

The solution, requiring more research and development, is likely to combine radio frequency technology with biometric identifiers.

The detective called downtown and had all transmissions about the Conjurer case changed to the citywide special-ops frequency.

We could match the vision of the eyes and the frequency response of the hearing receptors so that the cybernaut participants could move through the environment with the same senses as a Chtorran-but n was the other relationships that mattered.

By the time I reached my doss, the frequency of the depressive episodes had decreased, and their impact had abated drastically.

Finally he reached the point of adjusting the etalon, meticulous work wherein the plates had to be aligned just right to select the frequencies required.

Send Sergeant Major Gabbard an encrypted e-mail with a complete list of what s aboard so that I know what comms and frequencies to set up for the mission.

With perceptions attuned to the radio and microwave frequencies, they had before long turned groups of branch inds into radio telescope chains, piercing the heavy atmosphere and probing the universe in great detail, especially the very active center of the young galaxy.

And if you wish to have a very convincing illustration of the psychological inefficacy of legal threats, you have but to think of that curious crime which has now assumed a frequency never known to former centuries, namely the making of counterfeit money.