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Topic: Resonant frequencies

Related Topics

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Vocal cords

	Resonance - Wikipedia, the free encyclopedia
		Γ is a parameter dependent on the damping of the oscillator, and is known as the linewidth of the resonance.
		The linewidth is inversely proportional to the Q factor, which is a measure of the sharpness of the resonance.
		In this case the "driving frequency" corresponds to the energy with which the resonance is produced, the "resonant frequency" corresponds to the unstable particle's mass, and the linewidth Γ of the resonance corresponds to the inverse of the lifetime τ of the particle, Γ = 1 / τ.
	en.wikipedia.org /wiki/Resonant_frequency (641 words)

	[No title]
		Resonant filters with active tuning The filters described here circumvent this detuning problem by placing a converter's switching frequency (or a resonator's frequency response) under closed-loop control so that resonant attenuation is always maintained.
		To excite the parallel- and series-tuned resonators at resonance, the controller must, in either case, adjust the fundamental drive frequency such that the resonator current and voltage fundamentals are in phase.
		The capacitive divider presents a high impedance to resonator currents relative to the resonator capacitance, and provides a scaled version of the resonator's internal node voltage which, at the series-resonant frequency, is a measure of the PA driving current shifted $90^{\circ}$.
	web.mit.edu /~jphinney/Oldpublic/rawascii (5647 words)

	RF tagging system and RF tags and method - Patent 5381137
		The use of resonant circuit tagging is advantageous in that it is not subject to problems such as dirt obscuring a portion of a printed bar code and causing an error in determining the code associated with the article.
		Some systems have recognized that step adjustments of the resonant frequency of such tuned circuits is desirable and this has been implemented by punching holes of predetermined diameters in capacitive elements of the resonant circuit to thereby reduce capacitance and increase the frequency of the resonant circuit.
		Another alternative for adjusting tuned circuit frequency is to selectively remove metalizations from circuits on the tag 301 so as to adjust the frequency of the resonant circuits in accordance with the output of the microprocessor controller and memory 303.
	www.freepatentsonline.com /5381137.html (12038 words)

	Listening Room Dynamics & Control
		Resonant frequencies, i.e., the frequencies at which standing waves develop, depend on the dimensions of the listening room.
		These frequencies are called resonant frequencies (known also as characteristic frequencies) of the room and their corresponding standing wave pattern are called mode shapes of the room.
		The resonance frequencies and the corresponding mode shapes depend primarily on the shape and size of the room.
	www.deicon.com /listen_rm2.html (736 words)

	Resonant tag (US5119070)
		The resonant circuit is composed of a first conductive pattern formed by a conductive metal foil on one surface of an insulating thin film and a second conductive pattern formed by a conductive metal foil on the other surface of the insulating thin film.
		The capacitor element of the second conductive pattern, which corresponds to the resonant frequency, is disposed at a position where it faces the capacitor element of the first conductive pattern formed on one surface of the insulating thin film.
		When the resonant tag is used, the conductive metal foils formed on the two surfaces of the insulating synthetic resin film are electrically connected so as to turn off part of the resonant circuits, so that the resonant tag can be identified by a combination of resonant frequencies inherent in the remaining resonant circuits.
	www.delphion.com /details?pn10=US05119070 (544 words)

	Exploratorium: Science Snacks: Resonant Rings
		Each ring will vibrate at more than one frequency, but the shape of each ring will be different for each resonant frequency.
		The rings will also have different resonant frequencies if you shake the board up and down instead of sideways.
		The frequencies at which each ring vibrates most easily (its resonant frequencies) most easily are determined by several factors, including the ring's inertia (mass) and stiffness.
	www.exploratorium.edu /snacks/resonant_rings.html (452 words)

	Resonant Field Imaging - RFI Research
		A shift in the resonant frequencies demonstrate the change in coherence in the physiological body related to the shift in patterns in the cerebral area.
		During this study the colors of the frequencies were not a factor, except to the participants who received a color chart and color frequencies of the seven points for their own personal information.
		In this study the percentages of the initial and final entrainment ratios were recorded as a measure of the shift in the lower, middle and high entrainment levels, and this percentage was used to correlate to the shift in resonant frequencies measured before and after in the cerebral area.
	www.theodynamics.com /rfi/project.html (2714 words)

	Acoustic resonance - Wikipedia, the free encyclopedia
		Acoustic resonance is the tendency of an acoustic system to absorb more energy when the frequency of its oscillations matches the system's natural frequency of vibration (its resonant frequency) than it does at other frequencies.
		Acoustic resonance is an important consideration for instrument builders, as most acoustic instruments use resonators, such as the strings and body of a violin, the length of tube in a flute, and the shape of a drum membrane.
		Those frequencies that are not one of the resonances are quickly filtered out—they are attenuated—and all that is left is the harmonic vibrations that we hear as a musical note.
	en.wikipedia.org /wiki/Acoustic_resonance (946 words)

	Erowid Culture Vaults : Resonant Frequencies and the Human Brain
		When you resonate with something, you are emitting a wave signature which is "in sync" with it.
		What Tesla demonstrated was a principle of resonance known as entrainment - the ability of a frequency to cause a less powerful frequency to fall into rhythm simply by placing the two frequency emitters in close proximity.
		By experimenting with the effects of sonic frequencies on the brain, Monroe successfully isolated a little-known state of awareness which was totally separated from the physical body.
	www.erowid.org /culture/references/other/1997_turmel_resproject_1.shtml (1706 words)

	Motorola Product Testing Services Swept Sine Vibration
		This frequency range is generally selected to cover those frequencies that the product might see in actual use, but the intensity of the vibration may be increased over real world expectations.
		To parametrically evaluate resonance, a dimensionless number, transmissibility, which is the ratio of the acceleration experienced by the product to the acceleration input to the system, is used.
		Once resonant frequencies are determined, a common test to examine the worst case performance of the device under test is to dwell at those frequencies for a set period of time.
	www.motorola.com /testservices/swept_sine1.html (588 words)

	[No title]
		The frequencies at which the sound vibrations are strong are called resonant frequencies of the system, and these are easily recognized by listening to the sound intensity.
		The water level is raised and lowered within the resonant tube by raising or lowering the water reservoir (on the left).
		Hold the vibrating fork near the open end of the resonant tube and listen to the sound intensity as the water level is raised or lowered.
	www.lhup.edu /~dsimanek/scenario/labman2/soundvel.htm (1289 words)

	ASC Acoustic Basics
		At resonant frequencies (tones), the sound is louder and decays much more slowly than at non-resonant frequencies, causing uneven tonal quality and interference with clarity.
		Resonant frequencies occur mainly in the bass range, due to the relationship between the wavelengths of low-frequency sounds and the typical sizes of listening rooms.
		Since this is such a large portion of the musical spectrum, and because every room has potential resonant frequency problems in this bass range, it is imperative that the low frequencies be the first issue to address in improving any room's acoustics.
	www.asc-hifi.com /acoustic_basics.htm (1161 words)

	Resonance (Site not responding. Last check: 2007-10-13)
		In sound applications, a resonant frequency is a natural frequency of vibration determined by the physical parameters of the vibrating object.
		A child's playground swing is an example of a pendulum, a resonant system with only one resonant frequency.
		The blow with the stick is a complex excitation with many frequency components (as could be shown by Fourier analysis), but the spring picks out its natural frequency and responds to that.
	hyperphysics.phy-astr.gsu.edu /hbase/sound/reson.html (308 words)

	Tri-Vortex Product 1
		The resonant frequencies of the chemical elements are in the range of 2,000 and 5,000 Hertz known as background noise.
		The frequencies generated by fl holes and influenced by pressure and temperature are the foundation for the three dimensional aspects of the molecules in all chemical elements.
		Alterations or stresses on the phases of the Schumann Resonance by lunar and planetary influences probably are at least a precipitator to, or at the most a cause for, tectonic plates to slip or shift causing earthquakes.
	www.trivortex.com /Schumann.htm (5026 words)

	Room acoustics
		Modes are the resonant frequencies on which the waves interface and form maximums and minimums of sound pressure at different points in the room.
		The spectrum of resonant frequencies is discrete for low frequencies and continuous at the higher frequencies as shown in the following illustration.
		The lowest frequency of all modes is for the axial mode, and it can be calculated from f=C/2L, where C is the speed of the sound and L is the room length.
	home.tir.com /~ms/roomacoustics/roomacoustics.html (742 words)

	NOVA \| Elegant Universe \| Resonance in Strings \| PBS
		This is the string's fundamental resonant pattern, or frequency.
		The body of the violin has resonant frequencies, which work to amplify the sound created by the vibrating string.
		Each resonant pattern is a multiple of the fundamental frequency: The fundamental is half of a complete wave, the second harmonic is a complete wave, the third harmonic is one and a half waves, and the fourth harmonic is two waves.
	www.pbs.org /wgbh/nova/elegant/resonance.html (571 words)

	Anomalous dispersion and resonant absorption
		The ion resonances associated with the stretching and bending of molecular bonds typically lie in the infrared region of the electromagnetic spectrum.
		Thus, both air and water exhibit strong resonant absorption of electromagnetic waves in both the ultraviolet and infrared regions of the spectrum.
		In the first case this is due to electron resonances, and in the second to ion resonances.
	farside.ph.utexas.edu /teaching/jk1/lectures/node57.html (408 words)

	Standing waves (aka Resonant Frequencies)
		That frequency is called the fundamental resonant frequency of the string.
		One of the interesting things about the mode shown in Figure 3.40 is that its wavelength on the string is exactly half the wavelength of the mode shown in Figure 3.39.
		For example, we have seen modes of vibration with one and with two ``bumps'' on the string, but we could also have three as is shown in Figure 3.41.
	www.tonmeister.ca /main/textbook/node231.html (1330 words)

	Waveguide and Cavity Modes (Sound)
		The main utility of modal analysis for the purpose of room acoustics is to calculate the resonant frequencies of a room.
		Although the modal pressure patterns were irregular, it was found that the resonant frequencies were almost the same as a rectangular room with the same floor area.
		Simply knowing the resonant frequencies of a room really does not provide a lot of information, because the response in one part of a room is typically very different than another part.
	www.silcom.com /~aludwig/Physics/Main/Cavity_modes.html (1259 words)

	The TRUE Rife Technology
		Additionally and importantly, Rife used pairs of frequencies, where the one was selected to resonate with the specific micro-organism, and the other was selected so as to allow the most efficient transfer of this specific high frequency into the human body.
		For example, the specific resonant frequency of the BX virus (the only and singular cause of cancer, except for the BY virus which causes certain kinds of skin cancer) is on the order of 15,000,000 repetitions per second while the coupling frequency will be in the audio range.
		This is because the actual resonant frequencies of micro-organisms are inevitably in much higher frequency domains, ranging from hundreds of thousands of cycles per second, upward.
	www.rialian.com /rnboyd/rife.htm (649 words)

	Mechanical Characteristics of Rat Vibrissae: Resonant Frequencies and Damping in Isolated Whiskers and in the Awake ...
		Mechanical Characteristics of Rat Vibrissae: Resonant Frequencies and Damping in Isolated Whiskers and in the Awake Behaving Animal -- Hartmann et al.
		The horizontal arrows indicate the approximate half-cycle of the resonance.
		Two half-cycles of resonance are indicated by the horizontal arrows, but it is difficult to determine whether the second half-cycle constitutes resonance, active protraction, or a combination of both.
	www.jneurosci.org /cgi/content/full/23/16/6510 (7109 words)

	MP Digest (Site not responding. Last check: 2007-10-13)
		If a parallel resonance does fall within the operating passband it will be necessary to evaluate its depth in order to determine whether or not the loss is acceptable.
		At the frequency where the electrode thickness is at least one skin depth the ESR will increase as the vf.
		Parallel Resonant Frequency (FPR): A resonance occurring at approximately twice the FSR for a parallel plate capacitor.
	www.mpdigest.com /Articles/2006/June2006/ATC/Default.htm (1784 words)

	TRP: Resonant Frequencies and the Human Brain
		These current methods of "brainwave entrainment" are based on discoveries made by the 19th century inventor Nikola Tesla the electrical pioneer who developed the alternating current system of electricity that is currently in use all over the world.
		For those of you who wish to construct your own multilayered frequencies, there are several programs available for downloading on the net (see Syntrillium's Cool Edit).
		Of course, these principles can also be applied to anything which emits a distinct wave frequency which is just about everything there is! Science has yet to top out on the ingenious application of these concepts, and there¹s no reason why you too can't spend endless hours of fun messing around with your brain.
	www.voidspace.org.uk /psychology/resonance.shtml (1760 words)

	[No title]
		All you need to do is measure the resonant frequencies for your production of the schwa vowel [ə] in among.
		From your resonant frequencies and the speed of sound, you should be able to calculate the length of your vocal tract in cms.
		The frequency of the wave is just the number of cycles that occur in one second (divide one your duration measurement to find the number of cycles per second).
	www.ku.edu /~pyersqr/Ling107/acous.htm (585 words)

	Etheric Musings: Resonant Metallurgical Fluidator
		Metal melts when heated to a certain temperature because the resonant frequencies transmitted at and above that temperature set up a sympathetic vibration within the metal, a vibration that correlates positively with a similar frequency signature unique to the molten form of the particular metal.
		Thus, if specific frequencies carried by heat (and not the heat itself) melt metal, it is therefore possible that other sources of the same frequencies exist.
		The sublimation of metal is also possible, although the process requires the amplitude of the resonant frequencies to be much greater than that required for the liquescence of the same metal, in order to convert the solid metal directly into a gaseous state.
	www.steamenginechaos.com /mage/meltmetal.htm (2120 words)

	[No title] (Site not responding. Last check: 2007-10-13)
		Using the MATLAB program designed to determine the frequencies from the stiffness matrix of the deflections the frequencies were found to be 4.97 Hz, 10.39 Hz, 22.05 Hz, and 32.09 Hz.
		Also attached is a graph of the determinate verses the frequency, where the four resonant frequencies are where the line equals zero and a plot of the mode shapes of the vibrations at the four different resonant frequencies.
		Attached the building to a shaker table to induce vibrations, and record the resonance frequency at the first, second and third resonance.
	www.emba.uvm.edu /~lhodgett/materials/four_story.doc (961 words)

	Acoustic Sciences Recording Studio Acoustics Articles
		Resonant frequencies occur mainly in the bass range, due to the relationship between the wavelengths of low-frequency sounds and the typical sizes of people's rooms.
		ASC Sound Panels, Sound Planks, and Fractional Tube Traps are often used to control comb filter reflections, with the appropriate device chosen based upon the frequency of the problem.
		If this decay time, known as the room's reverberation time, is too long, sounds will linger within the space and begin to overlap with new sounds being made, creating an unintelligible cacophony.
	www.asc-studio-acoustics.com /acoustic_basics.htm (1197 words)

	Resonant Frequencies
		The wall may react to the various frequency energy in different degrees, based on the characteristics and component make up of the wall.
		This drop is known as the “coincidence dip” which reflects the resonant frequency of the wall assembly.
		Rather than rely on a single number STC rating, it can often be useful and more effective to look at the total performance data and select a wall, floor or ceiling assembly that will provide the most effective performance based on the anticipated sound generated through the structure.
	www.acousticalsurfaces.com /acoustic_IOI/101_22.htm (230 words)

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