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<blockquote data-quote="Buck" data-source="post: 8870875" data-attributes="member: 591582">&quot;The comparison between an acoustic duct and an electrical transmission line is useful in &quot;lumped-element&quot; modeling of acoustical systems, in which acoustic elements like volumes, tubes, pistons, and screens can be modeled as single elements in a circuit. With the substitution of pressure for voltage, and volume particle velocity for current, the equations are essentially the same.[2] Electrical transmission lines can be used to describe acoustic tubes and ducts, provided the frequency of the waves in the tube is below the critical frequency, such that they are purely planar.&quot;[URL unfurl=&quot;true&quot;]https://en.m.wikipedia.org/wiki/Acoustic_transmission_line#:~:text=Sound%20ducts%20as%20transmission%20lines,-A%20duct%20for&amp;text=Sound%20is%20introduced%20at%20one,at%20the%20speed%20of%20sound.[/URL]</blockquote>

[QUOTE="Buck, post: 8870875, member: 591582"] "The comparison between an acoustic duct and an electrical transmission line is useful in "lumped-element" modeling of acoustical systems, in which acoustic elements like volumes, tubes, pistons, and screens can be modeled as single elements in a circuit. [B]With the substitution of pressure for voltage[/B], [B]and volume particle velocity for current[/B], the equations are essentially the same.[2] Electrical transmission lines can be used to describe acoustic tubes and ducts, provided the frequency of the waves in the tube is below the critical frequency, such that they are purely planar." [URL unfurl="true"]https://en.m.wikipedia.org/wiki/Acoustic_transmission_line#:~:text=Sound%20ducts%20as%20transmission%20lines,-A%20duct%20for&text=Sound%20is%20introduced%20at%20one,at%20the%20speed%20of%20sound.[/URL] [/QUOTE]

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