In Reply to: RE: "resistive load that is the air." posted by Ivan303 on June 14, 2023 at 06:04:11:
Yes actually.
The term Rho C is in many calculations and is the density of air (about 1.21 kg per Cubic Meter) times the sound velocity.
Density or pressure does not change the speed of sound but density does change the acoustic load resistance as you suspected and it is reduced at altitude.
How much ambient pressure changes with altitude is interesting
https://www.omnicalculator.com/physics/air-pressure-at-altitude
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Follow Ups
- RE: "resistive load that is the air." - tomservo 11:45:30 06/14/23 (8)
- RE: "resistive load that is the air." - claudej1@aol.com 13:00:36 06/22/23 (2)
- RE: "resistive load that is the air." - tomservo 06:50:18 06/25/23 (1)
- RE: "resistive load that is the air." - claudej1@aol.com 13:02:58 06/25/23 (0)
- RE: "resistive load that is the air." - Paul Joppa 06:58:32 06/16/23 (2)
- Oh NO! - Ivan303 09:50:34 06/16/23 (1)
- RE: Oh NO! - Bill Fitzmaurice 10:53:06 06/16/23 (0)
- So does the reduced mass of air for a given volume (fewer molecules of air per cubic in/ft/meter)... - Ivan303 20:30:19 06/15/23 (1)
- RE: So does the reduced mass of air for a given volume (fewer molecules of air per cubic in/ft/meter)... - Bill Fitzmaurice 04:47:27 06/16/23 (0)