•
|
The bulk atmosphere attenuation for different relative humidities (, 20 % and 80 %).
|
•
|
The thermoviscous boundary layer attenuation for different duct radii (a = 0.5 mm, 2.0 mm, and 10.0 mm) modeled using the Narrow Region Acoustic feature.
|
•
|
The solution using the full thermoviscous acoustics equations in the cylindrical duct of radius a = 2.0 mm. This can be seen as a reference solution since it models both boundary layer and thermoviscous bulk losses.
|