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Topic: Sound energy flux

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Particle velocity

Sound intensity

Sound pressure level

Sound intensity level

Sound power

Sound power level

Sound

Particle velocity level

Speed of sound

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	Speed of sound Summary
		Sound can be described as a pressure disturbance that travels through the constituent particles of a medium: as one particle of the medium is perturbed by the pressure, it exerts a force on an adjacent particle, thus perturbing that particle in turn.
		In solids however, sound may propagate as a transverse wave, i.e., a type of wave in which the displacement of the medium is perpendicular to the direction of propagation of the wave.
		In conventional use and in scientific literature sound velocity, v, and sound speed, c, are used synonymously and should not be confused with sound particle velocity (also symbolized as v), which is the velocity of the individual particles.
	www.bookrags.com /Speed_of_sound (2746 words)

	Flux - Wikipedia, the free encyclopedia
		Stokes theorem states that the flux of the curl of a vector field is the line integral of the vector field over this boundary.
		Except in the case of active transport, net flux is directly proportional to the concentration difference across the membrane, the surface area of the membrane, and the membrane permeability constant.
		In ecology, flux is often considered at the ecosystem level - for instance, accurate determination of carbon fluxes (at a regional and global level) is essential for modeling the causes and consequences of global warming.
	en.wikipedia.org /wiki/Flux (1630 words)

	Speed of sound Information Center - coldplay speed of sound
		The coldplay: speed speed of sound in metals of sound speed of sound c (from Latin celeritas, "velocity") varies speed of sound through solids, liquids, and gases depending on the medium through which the download coldplay speed of sound sound waves pass.
		The speed cold play- speed of sound varies depending on atmospheric speed of sound speed of sound in solid liquid gas and vacume by coldplay conditions; the most important factor is the temperature.
		Thus the speed of sound increases with the speed cold play speed coldplay/ speed of sound of sound of sound stiffness of the material, and decreases with the density.
	www.scipeeps.com /Sci-Chemistry_Topics_S/Speed_of_sound.html (969 words)

	Sound Quality Terms and Definitions
		Arithmetic mean sound pressure level: Of several related sound pressure levels measured at different positions or sound pressure levels measured at different positions or different times, or both, in a specified frequency band, the sum of the sound pressure levels divided by the number of levels.
		Sound Energy, E: [ML ]; J-energy added to an elastic medium by the presence of sound, consisting of potential energy in the form of deviations from static pressure and of kinetic energy in the form of particle velocity.
		Sound transmission coefficient, r: [dimensionless]---of a partition, in a specified frequency band, the fraction of the airborne sound power incident on the partition that is transmitted by the partition and radiated on the other side.
	www.owenscorning.com /around/sound/definitions.html (6963 words)

	Sound Quality Glossary Terms
		Sound energy, E: [ML2T-2]; J-energy added to an elastic medium by the presence of sound, consisting of potential energy in the form of deviations from static pressure and of kinetic energy in the form of particle velocity.
		Sound energy is not necessarily absorbed; impedance mismatch, or reflection back toward the source, is often the principal mechanism.
		Sound intensity, I: [MT-3]; W/m2 the quotient obtained when the average rate of energy flow in a specified direction and sense is divided by the area, perpendicular to that direction, through or toward which it flows.
	www.owenscorning.com /around/sound/glossary.asp (7146 words)

	Glossary of Noise Terms
		To describe sound in a manner representative of the human ear's response it is necessary to reduce the effects of the low and high frequencies with respect to the medium frequencies.
		The energy expended during the sound wave vibration is called intensity and is measured in intensity units.
		Sound after it is ended at the source will continue to reflect of[ surfaces until the sound wave loses energy by absorption to eventually die out.
	www.quietnoise.com /glossary.htm (3273 words)

	Glossary of Terms
		In a sound field, the velocity caused by a sound wave of a given infinitesimal part of the medium, with reference to the medium as a whole.
		Airborne sound received at the ear of an observer being a composite of all sounds in the vicinity of the observer.
		Sound field in which the time average of the mean-square sound pressure is everywhere the same and the flow of acoustic energy in all directions is equally probable.
	users.aol.com /inceusa/glossary.html (3478 words)

	Aerodynamics, Acoustics, Shock Waves Propagation
		The speed of sound in the air considered as an ideal gas is proportional to the square root of the absolute temperature.
		Acoustic waves propagate at a constant speed, and the flow of acoustic energy is independent of the duct section (contrary to the progagation of a blast).
		The energy radiated in the space and attenuate as 1/r (the inverse of the radius).
	www.aerodyn.org /HighSpeed/waves.html (865 words)

	Sound Summary
		Sound is characterized by the properties of sound waves which are frequency, wavelength, period, amplitude and velocity or speed.
		In general, the speed of sound is proportional to the square root of the ratio of the stiffness of the medium and its density.
		In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity.
	www.bookrags.com /Sound (6589 words)

	Dictionary of Technical Terms for Aerospace Use - S (Site not responding. Last check: 2007-10-19)
		radio energy may be detected only at various distance intervals from the energy source as the result of the presence of an energy reflecting or refracting layer in the atmosphere.
		sound energy contained in a given infinitesimal part of the medium divided by the volume of that part of the medium.
		sound energy transmitted in the specified direction through a unit area normal to this direction at the point considered.
	roland.grc.nasa.gov /~dglover/dictionary/s.html (10691 words)

	Plane Waves (Sound)
		When I originally computed this flux for a traveling wave, using the variable variance value given in equation (33), I got the strange result that the ratio of energy flux to momentum flux was 7/9 the speed of sound.
		With this value, the ratio of energy flux to momentum flux for a traveling wave is 1/2 the speed of sound, exactly corresponding to the classical relationship between energy and momentum.
		For a light wave the ratio of energy carried by the wave divided by the wave momentum is equal to the speed of light.
	www.silcom.com /~aludwig/Physics/Main/Plane_waves.html (2032 words)

	Aerospace Science and Technology Dictionary S Page
		An ionization gage in which measurement is made of the electrons scattered by collision of the gas molecules with the electrons from a p-particle emitter.
		A phenomenon in which sound or radio energy may be detected only at various distance intervals from the energy source as the result of the presence of an energy reflecting or refracting layer in the atmosphere.
		In radio, radio energy that is received after having been reflected by the ionosphere.
	www.hq.nasa.gov /office/hqlibrary/aerospacedictionary/508/s.html (9890 words)

	Molecular model for sound wave derivation
		Equipartition of energy is a result of the frequent collisions between molecules.
		term in the kinetic energy flux is due to the rotational energy for each of the two spin axes.
		All of the results in Table (3) are valid for any probability distribution, except for the energy flux, which also assumes a distribution symmetrical with respect to its mean value.
	www.silcom.com /~aludwig/Physics/Main/Molecular_model.html (1624 words)

	Vastushastra,Vaastushastra,Vastu Science - ancient Indian knowledge for harmonious ambience in plots, lands, buildings, ... (Site not responding. Last check: 2007-10-19)
		Lord Ganesha, the Goddess of Learning, has always been associated with the primordial sound and word 'AUM' which is considered to be omniscient and omnipotent.
		Pyramids, mirrors, bells, gems, precious stones, metals, colours, yantras, trees, flowers serve as catalysts in reestablishing the connection between man and the divine energy.
		With all its sublime and mysterious ways, the basic parameters used in Vastushastra compliant designs are: geomagnetic flux, solar energy, sound energy, and water sources.
	mywebpage.netscape.com /vastuscience/homepage.htm (456 words)

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