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{{Short description|Opposition that a system presents to an acoustic pressure}} ...the [[rayl]] per square metre (Rayl/m²), while that of specific acoustic impedance is the pascal-second per metre (Pa·s/m), or in the MKS system the ...

'''Particle displacement''' or '''displacement amplitude''' is a [[measurement]] of [[distance]] of the movement of a [[sound particle]] from its [[mechan *<math>p</math> is the amplitude of the acoustic pressure; ...

...[[watt]] per square meter (W/m²). One application is the noise measurement of sound [[intensity (physics)|intensity]] in the air at a listener's locat '''Sound intensity level''' (SIL) or '''acoustic intensity level''' is the [[level (logarithmic quantity)|level]] (a [[logar ...

'''Transmission loss''' (TL) in duct [[acoustics]] describes the acoustic performances of a [[muffler]]-like system. It is frequently used in the ind ...the terminations. But measurement of the incident wave in a standing wave acoustic field requires uses of impedance tube technology, may be quite laborious, u ...

...musical instruments. Wind instruments consist of a tube which acts as an acoustic transmission line in which standing waves are set up. Open ended tubes mus ...d line]]. This instrument can also be used to measure [[VSWR]]. With the measurement of VSWR and the null positions the value of the terminating impedance's mag ...

...le.com/books?id=ElPyvaJbDiwC&q=sound+power+loudness&pg=PA94|title=Clinical Measurement of Speech and Voice|author=Ronald J. Baken, Robert F. Orlikoff|publisher=Ce ...power passing through an area is sometimes called ''sound [[flux]]'' or ''acoustic flux'' through that area. ...

...on, Physical Principles of Measurements with EMAT Transducers,''Ultrasonic Measurement Methods, Physical Acoustics'' Vol XIX, Edited by R.N. Thurston and Allan D. ...sm.<ref name=Maxfield2018>B.W. Maxfield and Z. Wang, 2018, Electromagnetic Acoustic Transducers for Nondestructive Evaluation, in ASM Handbook, Volume 17: ''No ...

...]] (QCM) based on the [[ring-down technique]]. It is used in interfacial [[acoustic sensing]]. Its most common application is the determination of a film thic ...uthor-last3=Fukuoka |title=Resonance Emat system for acoustoelastic stress measurement in sheet metals |journal=Review of Scientific Instruments |date=1993 |volum ...

...he characteristics of a speech signal. STI is a well-established objective measurement predictor of how the characteristics of the transmission channel affect spe ...s/0/data/en/NTi-Audio-AppNote-STIPA-Measurement.pdf Speech Intelligibility Measurement Methods]</ref> that a transmission channel has on speech intelligibility is ...

{{short description|Inspection or measurement in or of an underwater environment}} ...study of a subject''.<ref name="vocabulary" /> One meaning is the accurate measurement of a geographical region, usually with the intention of plotting the positi ...

'''Sound pressure''' or '''acoustic pressure''' is the local [[pressure]] deviation from the ambient (average o ===Acoustic impedance=== ...

...nbsp;m with accuracy to within ±1&nbsp;°C at a resolution of 0.01&nbsp;°C. Measurement distances of greater than 30&nbsp;km can be monitored and some specialised Physical measurement dimensions, such as [[temperature]] or [[pressure]] and [[tension (physics) ...

{{distinguish|Distance measurement}} ...ar]], the [[redshift]] of a distant [[galaxy]], or the angular size of the acoustic peaks in the [[cosmic microwave background]] (CMB) power spectrum) to anoth ...

It is the most widely used measure of orbital wobble in [[astronomy]] and the measurement of small [[radial velocity]] semi-amplitudes of nearby stars is important i ...e is the possibility that a constant ([[DC component]]) is included in the measurement. ...

...renceA">ISO 20998-1:2006 "Measurement and characterization of particles by acoustic methods"</ref><ref name="autogenerated2002">Dukhin, A.S. and Goetz, P.J. "U *[[Acoustic attenuation]] ...

...ualitative]] but not [[wikt:quantitative|quantitative]]. Elastography, the measurement of tissue stiffness, seeks to address these challenges. * Using [[#Acoustic radiation force impulse imaging (ARFI)|acoustic radiation force impulse]] imaging using ultrasound to remotely create a 'pu ...

...nsmission of energy to one direction. Common types of waveguides include [[acoustic waveguide]]s which direct [[sound]], [[optical waveguide]]s which direct [[ ...s serve as waveguides for light. In [[acoustics]], air ducts and [[Horn (acoustic)|horn]]s are used as waveguides for sound in musical instruments and [[loud ...

===Acoustic positioning=== {{main|Acoustic location|3D sound localization}} ...

...the market and required all amplifier manufacturers to use an engineering measurement (continuous average power) in addition to any other value they might cite.< ...-01|publisher=BoD – Books on Demand|isbn=9783831112999|page=246|quote=PMPO acoustic. peak music power output}}</ref> or ''Peak momentary performance output'',< ...

...of electromagnetic waves|Wave impedance|characteristic acoustic impedance|Acoustic impedance}} ...cite book|title=Planar Microwave Engineering: a Practical Guide to Theory, Measurement, and Circuits.|first=Thomas H.|last=Lee|author-link=Thomas_H._Lee_(electron ...