- 2005-10-06 10:37 am
Calculating everything with Mms (published on datasheet) without splitting into Mmd and two possible/probably different air loads is quite common though clear simplification causing some errors and limits what can be simulated. VituixCAD plays with this simplification familiar also with some other tools such as WinISD and UniBox. IB simulation gives the same result as closed box with infinite volume.
Especially horns and transmission lines require different approach. In addition, air load is frequency dependent so Mms = Mmd + Mm1 x some constant value is not fact with wide range of radiating areas and compliances.
Anyway, "Acoustics: Sound Fields and Transducers" by Beranek & Mellow says: