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...e the sound intensity using two [[microphone]]s. Another type measures the sound intensity using a microphone and a [[particle velocity probe]]. ==Sound intensity== ...

{{Sound measurements}} ...onic]] and those above 20 kHz are called [[ultrasound|ultrasonic]]. [[Sound]] is a [[mechanical wave]] and as such consists physically in [[oscillation ...

{{Sound measurements}} ...uared [[sound pressure]]. The [[International System of Units|SI unit]] of sound exposure is the [[Pascal (unit)|pascal]] squared second (Pa²·s). ...

...rst=Elden|date=16 June 2010|title=INDUSTRIAL NOISE SERIES Part IV MODELING SOUND PROPAGATION|url=https://www.lrl.mn.gov/docs/2015/other/150681/PFEISref_2/Ra ...te=2021-05-16|website=www.acoustic-glossary.co.uk}}</ref> In a free field, sound is attenuated with increased distance according to the [[inverse-square law ...

{{Sound measurements}} *Transmission loss in [[room acoustics]] describes the decrease of [[sound intensity]] that is reduced by a wall or other structure at a given frequen ...

...he characteristic dimensions of inhomogeneous inclusions through which the sound propagates. ...pagation varies slowly over the distances of wavelength, then an arbitrary sound wave can be approximated locally as a plane wave. In this case, the [[veloc ...

<math>c</math> is the velocity of sound in the given sample<br /> ...nsor]] head and the same sensor is used to record the reflected wave. The sound wave has a spherical pattern of propagation and will undergo different phen ...

{{Sound measurements}} ...n loss]] (TL) in duct acoustics is defined as the difference between the [[Sound intensity|power incident]] on a duct acoustic device ([[muffler]]) and that ...

...after any potentially damaging event, such as being dropped or exposed to sound levels beyond the device’s operational range. ...hones is then driven by a current <math>I_i</math> to act as the source of sound and the other responds to the pressure generated in the coupler, producing ...

...to the frontal subwoofer array. This will actively "absorb" any reflected sound. <math>c</math>: [[Speed of sound]] ...

...Arruda, J.R.F. [1993] applied the RDFS to condense spatially dense spatial measurements made with a [[laser Doppler vibrometer]] prior to applying [[modal analysis ...equally spaced data using a Regressive discrete Fourier series. Journal of Sound and Vibration, 156(3), 571–574. ...

...lly frequency information. TMA is done by marking from which direction the sound comes at different times, and comparing the motion with that of the operato The MLE method tries to fit the directional measurements (bearings) to a theoretical linear motion model of the target. The bearing ...

...rl=https://dx.doi.org/10.1016/0022-460X%2871%2990433-0 |journal=Journal of Sound and Vibration |volume=15 |issue=3 |pages=397–420 |doi=10.1016/0022-460X(71) ...

{{short description|Measure of energy loss as sound waves propagate through a medium}} ...ffect can be quantified through the [[Stokes's law of sound attenuation]]. Sound attenuation may also be a result of [[Thermal conductivity|heat conductivit ...

...1555&nbsp;m/s is accepted for calculation. Modern instruments use separate sound velocities for the different eye components to obtain the total axial lengt ...25–0.33mm has been reported between applanation and immersion axial length measurements, which can translate into an error of IOL power by approximately 1 D. In ge ...

...k on [[loudspeaker]] design, and the measurement of [[professional audio]] sound systems. Hughes first worked for [[Peavey Electronics]] designing loudspeak ...drudge work of taking a great many [[Polar coordinate system|polar plot]] measurements.<ref name=Becker2013/><ref>{{cite journal |url=http://www.excelsior-audio.c ...

...period. The number of measurements between any two time periods is finite. Measurements are typically made at sequential [[integer]] values of the variable "time". ...in proportion with the physical quantities such as temperature, pressure, sound etc. are generally continuous signals. Other examples of continuous signals ...

|title=Measurements of Ω and Λ from 42 High-Redshift Supernovae |title=Dark energy and cosmic sound ...

...>{{cite book |doi=10.1109/ULTSYM.1987.199011 |chapter=Schlieren Imaging of Sound Fields |title=IEEE 1987 Ultrasonics Symposium |year=1987 |last1=Korpel |fir ...ndra Nathe |first2=N. S. |title=The diffraction of light by high frequency sound waves: Part I. |journal=Proceedings of the Indian Academy of Sciences, Sect ...

...n is based on [[Heat capacity#At constant volume|isochoric heat capacity]] measurements. The isochoric heat capacity per particle of a monatomic liquid near to th ...fficient, compressibility) and transport coefficients (viscosity, speed of sound) in supercritical water, and found pronounced extrema as a function of pres ...