The acoustic ohm is a unit of measurement of
acoustic impedance
Acoustic impedance and specific acoustic impedance are measures of the opposition that a system presents to the acoustic flow resulting from an acoustic pressure applied to the system. The SI unit of acoustic impedance is the pascal-second per cu ...
, which is the ratio of acoustic pressure to acoustic
volume flow. In
SI units, pressure is measured in pascals and flow in m
3/s, so the acoustic ohm has units Pa·s/m
3. In the
cgs system, there is a cgs ohm with units dyne·s/cm
5.
The acoustic ohm can be applied to fluid flow outside the domain of acoustics. For such applications a hydraulic ohm with an identical definition may be used. That is, the unit of the ratio of hydraulic pressure to hydraulic volume flow. Acoustic impedance is to be considered an instance of hydraulic impedance.
See also
*
Dyne
The dyne (symbol: dyn; ) is a derived unit of force specified in the centimetre–gram–second (CGS) system of units, a predecessor of the modern SI.
History
The name dyne was first proposed as a CGS unit of force in 1873 by a Committee of ...
References
Definition
Units of measurement
Acoustics
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