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Topic: Acoustic theory

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Acoustics

Sound intensity

Sound

Musical acoustics

Room acoustics

Sound pressure level

Temporal masking

Loudspeaker acoustics

Transfer function

Psychoacoustics

Anechoic chamber

Applied mathematics

Fluid Dynamics

Music theory

Reverberation

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	The Acoustic Theory of Speech Production
		Acoustic speech output in humans and many nonhuman species is commonly considered to result from a combination of a source of sound energy (e.g.
		In this model the source of acoustic energy is at the larynx – the supralaryngeal vocal tract serves as a variable acoustic filter whose shape determines the phonetic quality of the sound (Fant, 1960).
		Formants are those frequencies at which local energy maxima are sustained by the supralaryngeal vocal tract and are determined, in part, by the overall shape, length and volume of the vocal tract.
	www.haskins.yale.edu /featured/heads/MMSP/acoustic.html (1241 words)

	Theory - Encyclopedia, History, Geography and Biography
		For a given body of theory to be considered part of established knowledge, it is usually necessary for the theory to characterize a critical experiment, that is, an experimental result which cannot be predicted by any established theory.
		Unfortunately, the usage of the term is muddled by cases such as string theory and "theories of everything," each probably better characterized at present as a bundle of competing hypotheses for a protoscience.
		In the humanities, theory is often used as an abbreviation for critical theory or literary theory, referring to continental philosophy's aesthetics or its attempts to understand the structure of society and to conceptualize alternatives.
	www.arikah.net /encyclopedia/Theory (1451 words)

	Theory: Definition and Links by Encyclopedian.com - All about Theory
		In mathematical logic, "theory" is the term for a set of well-formed formulae consisting of certain axioms and all theorems provable from said axioms.
		There are two types of theories; a supposition which is not backed by observation is known as a conjecture, and if backed by observation it is a hypothesis.
		A theory is also different from a physical law in that the former is a model of reality whereas the latter is a statement of what has been observed.
	www.encyclopedian.com /th/Theory.html (558 words)

	Estimating formation stress using borehole monopole and cross-dipole acoustic measurements: theory and method - US ... (Site not responding. Last check: 2007-11-04)
		Acoustic monopole/dipole well logging instruments are used, among other purposes, for making measurements related to the shear propagation velocity and the compressional propagation velocity of earth formations penetrated by a wellbore.
		The arrival of the acoustic energy at the successively positioned receivers is detected to trigger electrical circuits in the tool which function to ascertain a characteristic of the formation from the pulse of acoustic energy traveling the predetermined distance between the array receivers.
		borehole acoustic dipole: an acoustic wave that propagates along the borehole and whose associated particle motion (e.g., polarization) is primarily in one direction that is perpendicular to the borehole.
	www.patentstorm.us /patents/6098021.html (9498 words)

	Acoustic Fingerstyle Guitar Page
		It is used for classical guitar, and some other acoustic styles, but it has found its way into other genres as well.
		American fingerstyle guitar is commonly played on steel string acoustic guitars with 6 or 12 strings.
		Acoustic Fingerstyle Guitar, copyright © 1998 Paul Kucharski.
	www.acousticfingerstyle.com (493 words)

	Acoustic theory -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-04)
		Acoustic theory is the field relating to mathematical description of (The sudden occurrence of an audible event) sound ((physics) a movement up and down or back and forth) waves.
		See (The study of the physical properties of sound) acoustics for the (The discipline dealing with the art or science of applying scientific knowledge to practical problems) engineering approach.
		where is the acoustic pressure and is the acoustic fluid velocity vector, is the vector of spatial coordinates, is the time, is the static density of air and is the speed of sound in air.
	www.absoluteastronomy.com /encyclopedia/a/ac/acoustic_theory.htm (353 words)

	Acoustic Theory (Site not responding. Last check: 2007-11-04)
		The second segment comprises an acoustic transducer on a Transceiver which is normally temporarily installed on the vessel - or on a Tow Fish.
		A number of (at least three but typically four) acoustic transducers are fitted in a triangle or a rectangle on the lower part of the vessel.
		USBL principles are very similar to SBL principles (in which an array of acoustic transducers is deployed on the surface vessel) except that the transducers are all built into a single transceiver assembly - or the array of transducers is replaced by an array of transducer elements in a single transceiver assembly.
	www.sonardyne.com /theory.htm (1513 words)

	Syllabus: Audio: Theory, Criticism, and Aesthetics
		An examination of theories of aurality, psycho-acoustics and the development of the audio aesthetic in art, theater, installations, radio, film, television, and multi-media.
		The mythology of Aurora and Tithonus and their son Memnon, for example, is rife with acoustical references.
		"acoustics of the ball court at Chichen." Be aware that some of these links are for sites of questionable scientific validity.
	www.unc.edu /%7Ejimlee/141syl01.htm (5005 words)

	Steel Pan Tuning - Acoustic Function of the Steel Pan
		To be able to discuss the theoretical aspects of the steel pan later, the section begins with a chapter on music acoustics.
		The new acoustic factors introduced by the curving of the shell are the rise and the shape of the dent.
		According to acoustic theory, a suppressive tension applied on a vibrating body lowers the frequency of the tone.
	hotpans.se /pan/tuning/theory.19.html (2131 words)

	J. C. Bowles, The Kennedy Assassination Tapes: Rebuttal to the Acoustical Evidence Theory: House Select Committee: ...
		The Committee Report acknowledges that the theory of a fourth shot, thus a second assassin, and thus the likelihood of a conspiracy rests entirely on the accurate determination of the assumptions based on a small segment of a recording, thirteen years of age.
		The deductions through which the Committee concluded that the subject motorcycle was McLain's in Dealey Plaza are based on impressive acoustical analyses, and we would suppose the Committee are sincere.
		It is not necessary to argue acoustics as a science.
	www.jfk-online.com /bowles4.html (6010 words)

	Acoustic Transponders: Technology Gallery for Discovery of Sound in the Sea
		There are several types of acoustic navigation systems, ranging from ultra short baseline to long baseline.
		An acoustic transponder, operating at a set frequency, is attached to the equipment that is to be tracked, such as a side scan
		A hydrophone measures the acoustic range and bearing to the transponder.
	www.dosits.org /gallery/tech/n/at1.htm (342 words)

	Acoustic theory (Site not responding. Last check: 2007-11-04)
		Acoustic residues; number theory, the paradigm of pure mathematics, helps change the sound of small rooms and concert ha...
		Hitsamatsu K. Analysis of acoustic emission from hydraulically...
		Acoustic Differences Between Content and Function Words in Amyotrophic Lateral Sclerosis.
	hallencyclopedia.com /Acoustic_theory (346 words)

	Acoustic theory: Definition and Links by Encyclopedian.com - All about Acoustic theory
		Classical acoustic theory derives from fluid mechanics, and centers on the mathematical description of sound waves.
		where $p(\mathbf{x}, t)$ is the acoustic pressure and $\mathbf{v}(\mathbf{x}, t)$ is the acoustic fluid velocity vector, $\mathbf{x}$ is the vector of spatial coordinates $x, y, z$ , $t$ is the time, $\rho-0$ is the static density of air and $c$ is the speed of sound in air.
		transfer function sound pressure[?] acoustic impedance[?] acoustic resistance[?] law of gases frequency Fourier analysis
	www.encyclopedian.com /ac/Acoustic-theory.html (247 words)

	Easy Guitar Method 1 - Acoustic and Electric Guitar Course
		If you want to learn to play guitar then the easy guitar method is both a fun and easy way to learn all the basics and more.
		No difficult music theory, no impossible playing exercises and no difficult to read sheet music and examples, everything in the easy guitar series is EASY.
		In this course you will learn everything about the guitar, guitar playing and just the basic music theory that you need to start learning and playing.
	www.musicianuniversity.com /courses/easy_guitar_method_1.html (1147 words)

	Remove Acoustic (Site not responding. Last check: 2007-11-04)
		Dove Ceilings is the leader in acoustic ceiling removal in Southern California.
		Acoustic Neuroma Surgery: A Patient's Perspective by Gary Hunt Disclaimer: This account is my...
		An acoustic neuroma is a type of benign tumour that grows in...
	www.doveceilings.com /6/acoustic268.html (591 words)

	ABS (Site not responding. Last check: 2007-11-04)
		is an acoustics based device that measures bubble size distributions and void fraction of bubbles in liquids.
		The device extracts the bubble population from acoustical measurements made at several frequencies.
		In addition, the acoustic technique is very sensitive to bubbles and is not fooled by the presence of particulate matter which are optically not readily distinguishable.
	www.dynaflow-inc.com /Products_DW/Software/ABS/ABS_DW.htm (255 words)

	Underwater Acoustic Field Extrapolation: Theory and Sensitivity Analysis - Storming Media (Site not responding. Last check: 2007-11-04)
		Abstract: In some underwater acoustic applications, it is desirable to predict what an acoustic field will be at some distance away from a source.
		Actual acoustic measurements are another possibility, but our knowledge of the fields is then limited to the points in the ocean where the sources and receivers are located.
		The basic theoretical formulation is stated and analyzed using the theory of normal modes.
	www.stormingmedia.us /52/5294/A529492.html (300 words)

	Acoustic theory - Wikipedia
		The subtleties of thermodynamics are difficult enough to recommend a gradual familiarization with some related problems of vibration such as arise in mechanical sound production: motion of a spring vibration of a string equation of motion harmonic.
		Besides the the math tools that we will use again, the preceding examples help inform the beginner's physical intuition with analogies to the periodic compression domains transfer function sound pressure acoustic impedance acoustic resistance law of gases
		See instrumental acoustics, music theory voice production formant speech synthesis
	nostalgia.wikipedia.org /wiki/Acoustic_theory (158 words)

	People and Sound in the Sea: Useful Resources from Discovery of Sound in the Sea
		Benoit-Bird, K.J., Au, W.L., Kelley, C.D. and Taylor, C. Acoustic backscattering by deepwater fish measured in situ from a manned submersible.
		Acoustic tracking of whales using hydrophone arrays: Implications for behavioral studies and population estimates.
		McDonald, M.A., Hildebrand, J.A. and Webb, S.C. Blue and fin whales observed on a seafloor array in the Northeast Pacific, Journal of the Acoustical Society of America, 98(2): 712-721 p.
	www.dosits.org /teacher/peoplesound.htm (648 words)

	Harmony Central®: Guitar: Instruction
		Theory Lessons.com - Free lessons covering a variety of theory topics.
		Acoustic Music Webtools - Some great little JavaScript tools for figuring out capo points, finding chords for melodies, and chord speller.
		Chord and Theory Chart (42K)- Covers basic music theory, has a detailed discussion of chord construction, and also talks about modes.
	www.harmony-central.com /Guitar/instruction.html (1683 words)

	Citations: Theory of generalised holography and development of NAH - Maynard, Williams, Lee, Holography (SMEALSearch) - ... (Site not responding. Last check: 2007-11-04)
		Maynard, E.G. Williams, Y. Lee, Nearfield Acoustic Holography, Theory of generalised holography and development of NAH, J. Acoust.
		The basic idea is to take advantage of the complexity and richness of the source nearfield information (radiated and flexural field) This is performed by realizing a set of acoustical measurement in a plane which should be....
		The basic idea is to take advantage of the complexity and richness of the source nearfield information (radiated and flexural field) This is performed by realizing a set of acoustical measurement in a plane which should be parallel and cover the....
	smealsearch2.psu.edu /context/38860/0 (280 words)

	The Dallas Police Department's Channel 1 Dictabelts: The Chain of Possession
		The acoustics evidence is central to the question of whether or not President Kennedy was killed as the result of a conspiracy.
		If, as this paper suggests, the most fundamental aspect of that acoustics evidence – the authenticity of the police radio recordings – is questionable, then the very foundation upon which the question of conspiracy is based is unreliable.
		If that were to be proven, the acoustics evidence – officially, the only basis for a conclusion of conspiracy in the assassination of President Kennedy – would again become a live issue.
	mcadams.posc.mu.edu /scally.htm (6950 words)

	2pPA11 An electrical-discharge, steam-bubble acoustic source---theory and (Site not responding. Last check: 2007-11-04)
		As the high-pressure, high-temperature liquid expands against the surrounding hydrostatic load, the phase transition to steam occurs.
		The rapid volume growth of the steam bubble then gives rise to a very broadband, high-frequency acoustic pulse.
		Experimental data are presented for 1.9-cm-diam electrodes separated by 1.0 cm in 20 (Omega) cm seawater.
	www.auditory.org /asamtgs/asa93dnv/2pPA/2pPA11.html (187 words)

	Fundamentals of Acoustic Field Theory and Space-Time Signal Processing (Site not responding. Last check: 2007-11-04)
		Providing a wealth of information on fundamental topics in the areas of linear air and underwater acoustics, as well as space-time signal processing, this book provides real-world design and analysis equations.
		As a consequence of the interdisciplinary nature of air and underwater acoustics, the book is divided into two parts: Acoustic Field Theory and Space-Time Signal Processing.
		It covers the fundamentals of acoustic wave propagation as well as the fundamentals of aperture theory, array theory, and signal processing.
	mountainstatestech.com /bookstore/item_0849394554.html (125 words)

	E-Page Ads ~ Newsletter No. 92 - Survey, Geophysical and Underwater Marketplaces Dated October 14, 2002
		The vertical catenary position of the bundle is provided by a string of pipe-mounted acoustic transponders equipped with depth sensors located at intervals along it.
		The data from the gyros was transmitted acoustically by the transponders and converted into a graphic display that enabled operators aboard the tow vessel to monitor the behaviour of the pipe and act before any excessive snaking of the bundle occurred.
		It is recognised as a world leader in the design and manufacture of advanced acoustic instruments and systems for accurate survey, positioning and tracking in shallow and full ocean depth operations within the offshore oil and gas industries.
	www.e-pageads.com /survey-marketplace/newsletter/newsletter92.html (7021 words)

	A Klein-Gordon Acoustic Theory (ResearchIndex) (Site not responding. Last check: 2007-11-04)
		Abstract: I propose the Klein-Gordon differential operator, from electromagnetics, as a basis for acoustic wave studies in variable-density media.
		A change of the dependent variable in the acoustic variable-density wave equation reveals it to be essentially the simpler Klein-Gordon equation, in disguise.
		Because it may be analyzed for constant-coefficient cases, the Klein-Gordon differential equation affords an attractive analytical setting for investigating the behavior of waves and rays.
	citeseer.ist.psu.edu /524483.html (148 words)

	Acoustic Chord Theory
		I've expanded my practice set-list to include acoustic songs, and distorted songs arranged for acoustic.
		Playing acoustically is nothing more than playing chords.
		One problem, however, is that power chords, which is what most of Metallica's music is composed of, doesn't sound very full played clean.
	members.tripod.com /~badseed_08/tutorials/acousticchords.html (705 words)

	KIE Evidence: History of Acoustic Theory (Site not responding. Last check: 2007-11-04)
		The following link will take you to a page containing both an overview of the field of acoustics, and a history of acoustic theory.
		Pay particular attention to figure 1-2 (linked toward the bottom of the document), which is a drawing by Sir Isaac Newton demonstrating the fact that sound can "bend" around corners.
		In particular, Newton discovered that sound will diffract, but that the more a sound wave bends, the weaker it becomes.
	www.kie.berkeley.edu /ned/data/E01-970624-003/E01-970624-003.html (74 words)

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