Frequencies Sentence Examples
The careful measurements of Kayser and Runge of the carbon bands show that the successive differences in the frequencies do (1900), I, p. 399.
Wolfer's frequencies with data obtained by other observers for areas of sun-spots, and his figures show unquestionably that the unit in one or other set of data must have varied appreciably from time to time.
The difference between the frequencies of the roots (s = co) is given by This is the first law.
In many experiments, however, different inductions and frequencies are employed, and the hysteresis-loss is often expressed as ergs per cubic centimetre per cycle and sometimes as horse-power per ton.
The whole series of fundamental and overtones gives the complete set of harmonics of frequencies proportional to 1, 2, 3, 4, ..., and wave-lengths proportional to 1, 2, 3, 4 ..Advertisement
Then, since the frequencies are the same, U/2L = U3 /2l or L/l = U/U8.
Deslandres,s who found that the successive differences in the frequencies formed an arithmetical progression.
If we wish to be more general, while still adhering to Deslandres' law as a correct representation of the frequencies when s is small, we may write n - A (s+ 1 1) 2 - - a Po+Pi(s + c) -F +pr(s+ c)r' where s as before represents the integer numbers and the other quantities involved are constants.
A band might in that case fade away towards zero frequencies, and as s increases, return again from infinity with diminishing distances, the head and the tail pointing in the same direction; or with a different value of constants a band might fade away towards infinite frequencies, then return through the whole range of the spectrum to zero frequencies, and once more return with its tail near its head.
The Scandinavian data, from the wealth of observations, are probably the most representative, and even in the most northern district of Scandinavia the smallness of the excess of the frequencies in December and January over those in March and October suggests that some influence tending to create maxima at the equinoxes has largely counterbalanced the influence of sunlight and twilight in reducing the frequency at these seasons.Advertisement
The method of counting frequencies was fairly alike, at least in the case of A and B, but in comparing the different stations the data should be regarded as relative rather than absolute.
It is also necessary to notice that shunt instruments cannot be used for high frequencies, as then the relative inductance of the shunt and wire becomes important and affects the ratio in which the current is divided, whereas for low frequency currents the inductance is unimportant.
If, in this latter case, the proportion of cases in which b is B to cases in which b is not-B is the same for the group of pN individuals in which a is A as for the group of (I-p)N in which a is not-A, then the frequencies of A and of B are said to be independent; if this is not the case they are said to be correlated.
Experiments, which will be described most conveniently when we discuss methods of determining the frequencies of sources, prove conclusively that for a given note the frequency is the same whatever the source of that note, and that the ratio of the frequencies of two notes forming a given musical interval is the same in whatever part of the musical range the two notes are situated.
A mode of exhibiting the ratio of the frequencies of two forks was devised by Jules Antoine Lissajous (1822-1880).Advertisement
If two such flames are placed one under the other they may be excited by different sources, and the ratio of the frequencies may be approximately determined by counting the number of teeth in each in the same space.
All experiments in frequency show that two notes, forming a definite musical interval, have their frequencies always in the same ratio wherever in the musical scale the two notes are situated.
But keeping r/X small we may as before form stationary waves, and it is evident that the series of fundamental and overtones will be just as with the air in pipes, and we shall have the same three types - fixed at one end, free at both ends, fixed at both ends - with fundamental frequencies respectively 41, p ' 21 V p, and I velocity in rod =velocity in air X distance between dust heaps.
The formation of beats may be illustrated by considering the disturbance at any point due to two trains of waves of equal amplitude a and of nearly equal frequencies n, n2.
Thus the interval b'c" with frequencies 495 and 528, giving 33 beats in a second, is very dissonant.Advertisement
Thus, take the major seventh with frequencies 256 and 480.
It can be shown mathematically that the velocity of propagation will be greatly increased if the frequency of the light-wave is slightly greater, and greatly diminished if it is slightly less than the natural frequency of the molecules; also that these effects become less and less marked as the difference in the two frequencies increases.
The power of a spectroscope to perform its main function, which is to separate vibrations of different but closely adjacent frequencies, is called its " resolving power."
Lord Rayleigh, to whom we owe the first general discussion of the theory of the spectroscope, found by observation that if two spectroscopic lines of frequencies n1 and n, are observed in an instrument, they are just seen as two separate lines when the centre of the central diffraction band of one coincides with the first minimum intensity of the other.
We may say therefore that if the difference between the frequencies n 1 and n, of the two waves is such that in the combined image of the slit the intensity at the minimum between -the two maxima falls to 0.81, the lines are just resolved and n l /(n l n 2) may then be called the resolving power.Advertisement
The roots of the three series have frequencies which diminish as the atomic weight increases, but not according to any simple law.
Halm,' to whom we owe a careful comparison of the above equation with the observed frequencies in a great number of spectra, attached perhaps too much weight to the fact that it is capable of representing both line and band spectra.
Arcs, bands and, generally speaking, the more regular and persistent forms, show their greatest frequencies earlier in the night than rays or patches.
All are observed frequencies, derived after Wolf's method; maxima and minima are in heavy type.
Oliver Heaviside showed mathematically that uniformly-distributed inductance in a telephone line would diminish both attenuation and distortion, and that if the inductance were great enough and the insulation resistance not too high the circuit would be distortionless, while currents of all frequencies would be equally attenuated.
We have already explained how beats are used on Scheibler's tonometer to give a series of forks of known frequencies.
As purity and resolving power are essentially positive quantities, n i in the above expression must be the greater of the two frequencies.
Rydberg favours the former view, but he does not attempt to obtain any very close approximation between the observed and calculated values of the frequencies.
But that it may be given by the ordinary diatomic molecule is exemplified by oxygen, which gives in thick layers by absorption one of the typical sets of bands which were used by Deslandres and others to investigate the laws of distribution of frequencies.
The above figures would be almost conclusive if it were not for the conspicuous differences that exist between the mean sun-spot frequencies for different II-year periods.
Schuster, who has considered the matter very fully, has found evidence of the existence of other periods-notably 8.4 and 4.8 years-in addition to the recognized period of 11.125 years, and he regards the difference between the maxima in successive II-year periods as due at least partly to an overlapping of maxima from the several periodic terms. This cannot, however, account for all the fluctuations observed in sun-spot frequencies, unless other considerably longer periods exist.
A formula, similar to (5), may be given for the frequencies of vibration of a spherical mass of liquid under capillary force.
When the rings are coloured symmetrically with respect to two perpendicular lines the acute bisectrix and the plane of the optic axes are the same for all frequencies, and the colour for which the separation of the axes is the least is that on the concave side of the summit of the hyperbolic brushes.
Genetically, races differ with respect to allele frequencies rather than in the possession of unique allele frequencies rather than in the possession of unique alleles.
Low Pass Filter This lets through the lower frequencies and attenuates the higher frequencies.
At these frequencies some form of distributed decoupling capacitance is necessary.
It might also contain a graph showing allowable deviations at high and low frequencies, similar to the gray lines in the graph above.
We now know that cold clean Antarctic ice behaves as a low loss dielectric over a wide range of radar frequencies.
Allele frequencies are used where parental genotypes are missing.
This was at the fundamental frequency and/or low-order harmonics, not the high frequencies of noise.
Significantly increased jitter was present in PPS patients as compared to normal controls at all 5 stimulation frequencies studied.
There is no directivity at low frequencies, therefore it does not matter where the bass loudspeakers are placed in the room.
The integration is done in frequency partitions that use the midpoints between adjacent spectral peak frequencies.
And the easy listening experience is enhanced by a detailed, expressive midrange and tightly controlled low frequencies.
Suddenly the machine emitted a noise that was like every sound ever made in the world put together, infinite frequencies.
Pirate stations are particularly partial to the RSL frequencies because of the ease with which they can drown out their signal.
The peaks arise because the denominator will approach zero at sinusoidal frequencies, resulting in exceedingly sharp spectral peaks.
AbFoam is an open cell polyurethane foam specifically designed to absorb noise over a wide range of frequencies.
Centimetric radar uses frequencies in the band 3,000 to 30,000 Mc/s.
Why do the durations and frequencies of both normal and reversed states seem random?
Silicon, with lower resistivity, also tends to operate at lower frequencies, in the ' Slow wave ' mode.
Being a physicist, my first thought was merely to tabulate the required frequencies of the twelve semitones of the octave.
If what you say is true, then why are units not limited to keep the free frequencies, including sidebands inside the bandwidth?
The Spectrum Any sound can be constructed by adding up enough sine waves of differing intensity levels, frequencies and starting times.
The tweeter is the smaller unit and handles higher frequencies while the larger woofer is for mid to lower frequencies.
If the two circuits are in tune so that the numerical product of capacity and inductance of each circuit is the same or C L, = C L +CL and if k is the coefficient of coupling then the natural frequency of each circuit is n = I /2w / (CL), and when coupled two oscillations are set up in the secondary circuit having frequencies n and n2 such that n = n0/ (i - k) and n = nh,/ (I +k).
When two tones are sounded together with frequencies not very different, " beats " or swellings-out of the sound are heard of frequency equal to the difference of frequencies of the two tones (see below).
Using the term " note " for the sound produced by a periodic disturbance, there is no doubt that a well-trained ear can resolve a note into pure tones of frequencies equal to those of the fundamental and its harmonics.
Michelson, who has compared the theoretical widening with that found experimentally by means of his interferometer, had to use a somewhat more complicated expression for the comparison, as his visibility curve does not directly give intensities for particular frequencies but an integral depending on a range of frequency?
The recombination frequencies vary among different genetic loci in the genome.
Chromatic Aberration, where different frequencies of light refract at different angles causing blurred images.
The size and mass of the panels also makes them more efficient resonators at the lower frequencies.
Water quality in water supply zones The Company complied with the required sampling frequencies in all zones.
Most importantly, Bayesian analysis of word frequencies, and latent semantic indexing should be investigated as a means of matching text-based records.
In the latter case, the offending signals are at frequencies much too high to respond to in a servo loop.
When you perform Fourier analysis, you assume that the signal is composed of sine waves of different frequencies.
These high frequencies are then sorted by the amp and unraveled to reveal the stuff coming out of the two extra speakers.
Spirit includes Soul, which vibrates at higher frequencies than does physical matter.
When you begin looking at monitors, you'll notice differences in frequencies from one model to the next.
Monitors generally come in frequencies of 49 MHz, 900 MHz, and even 2.4 GHz.
Sony baby monitors approach this problem with 27 different frequencies to minimize interference.
Along with the 27 frequencies, Sony offers a variety of features to help caregivers and parents experience the freedom to move around the house with the peace of mind that they will know when the baby wakes.
This unit plugs into the wall, needs no recharging and has three small lights-red, green and yellow-controlled by a switch that allows for 27 different frequencies.
This ensures that you don't experience overlapping frequencies.
More expensive monitors are available in 90 MHz frequencies and 2.4 GHz which have fewer problems with interference.
Using two separate video monitors increases the risk of frequency interference since monitors often use similar frequencies.
Baby monitors work on specific frequencies, along which the sound or video travels.
When other electronics use the same frequencies, including multiple monitors, televisions or the monitors in a neighbor's home, there may be interference on the monitor.
This prevents bass frequencies from traveling through walls and floors, which can greatly add to your neighbors' peace of mind.
Certain types of two-way radios need to be registered with the FCC because of frequencies they use and the distances they can attain.
Some cordless phone buyer's guides may not mention this type of phone because they operate on similar frequencies and the benefits are not enough to spend additional money.
A single band router will only offer one frequency or the other, while a dual band router will simultaneously create networks on both frequencies.
These layers allow the panels to utilize either different frequencies of sunlight, and/ or artificial light.
Also known as bass shakers or motion actuators, tactile transducers respond to low frequencies within a movie and allow you to feel what you are seeing and hearing on screen.
There is usually a sale in the summer around June and one in January after the holidays, but the sale times and frequencies sometimes change.
The tuning forks work by transmitting sound frequencies through the body.
Campus radio stations broadcast on common AM and FM frequencies.
Dogs hear at much higher frequencies so any sound, especially the sharp and high ones, is much more intense and louder.
Unfortunately, only a few frequencies were used to run the openers.
Developed by Dr. Jeffrey Thompson, an expert in brainwave frequencies and sleep for health and well-being, this musical program is a natural sleep aid that does not involve a high cost, taking medication, or time commitment.
As all of the light from the room enters the glasses, special lenses filter out all frequencies of light, but allow only infrared light to come through.
It's not to say that one particular handset is better than another, per se, but they can be based on very different technologies and operate on very different frequencies.
In a nutshell, the four most common frequencies that GSM cell phones operate on are 850MHz, 900MHz, 1800MHz, and 1900MHz.
This is akin to the frequencies that you use with cordless phones in the home, except you're not exactly free to choose which frequency you want to use.
In North America, networks work on the 850MHz and 1900MHz frequencies, whereas in Europe and a lot of other areas of the world, they use 900MHz and 1800MHz.
This is a phone that can work worldwide because it is capable of using all four frequencies.
If you are looking to find the best cell phone to communicate within Canada, you'll want to keep "bands" or "frequencies" in mind.
Before investing in an overseas phone, you'll want to make sure the frequencies are compatible.
Without the right frequencies in place, your phone won't work.
This is because they use slightly different technology for their networks, as well as different frequencies, which are also known as bands.
The results of a bone conduction test determine how soft a sound an individual can hear over several frequencies or pitches.
Auditory steady-state response (ASSR) testing also involves monitoring recorded responses from the scalp of tones at varying frequencies.
The chart reflects the softest (lowest volume) sounds that can be heard at various frequencies or pitches.
They are extremely rare, with frequencies reported at one in 30,000 to one in 150,000, although these numbers are only estimates.
Mild hearing loss involving high frequencies may also impair a child's ability to hear language correctly and be able to repeat phonetic sounds.
This snail-shaped structure contains fluid and thousands of microscopic hair cells tuned to various frequencies, in addition to the organ of Corti (the receptor for hearing).
And, even when all appropriate protocols are followed, most of the frequencies of DNA markers have known rates of error.
Ghouli and several other local groups tested the area for any other paranormal activity such as authentic orbs, EVPs (electronic voice phenomenon), EMF readings (electro-magnetic frequencies) or temperature anomalies.
The focus is on helping individuals on the autism spectrum to increase beta and SMR frequencies while reducing alpha, theta and delta brainwaves.
Cordless phones transmit signals at different frequencies using analog or digital technology.
These phones distribute a call across several frequencies, providing added security and additional shielding from RF interference.
Copper is an excellent conductor and transmits data in frequencies.
Your telephone company's equipment design limits the frequencies that it can transmit.
Because these frequencies are limited, several wires can be bound into huge cable pairs without cross-connections in the transitions of analog data.
Cable modems provide greater speeds because they don't use phone lines but a range of frequencies in the RF television band.
The method ensures that the two frequencies shall be exactly the same.