The voice coil impedance frequency dependence due to Eddy current, skin, and proximity effects (Eddy Losses) becomes more apparent as the frequency becomes higher. The theory is that the magnitude of lossy impedance frequency dependence is vw . However in the majority of real loudspeakers, the impedance frequency dependence was empirically found to be clearly higher than this. A voice coil blocked impedance model was developed based on a structure that applies a transformer for the voice coil inductance as the primary winding. Surrounding conductive material is treated as an impedance connected to the secondary winding. The model successfully describes the blocked impedance frequency dependence that agreed at a high degree of accuracy with the actual samples. Also the model showed intricate connections between the transformer coupling coefficient k and the magnitude of frequency dependency.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
