After teaching transducer measurements to master’s students for several years, we noticed that the voice coil inductance and the associated physical phenomena inside the loudspeaker motor are frequently considered the most challenging concepts for students to grasp. Consequently, we developed a 3-hour practical lab session to address this topic, where students are guided to measure the voice coil in various configurations. The voice coil impedance is measured in various conditions, including air, in the disassembled speaker motor (without magnet), inside conductive but non-magnetic materials, with another coil shorted in its proximity, and inside the assembled motor. The objective of the lab is to gain a clear understanding of the influence of each phenomenon related to permeability, currents, and other related factors. The purpose of this document is twofold: first, to serve as a support material for students; and second, to share our university laboratory experience with other institutions.