Abstract
A common moving-coil loudspeaker is useful for learning harmonic motion. A simple optical method is used to observe free and forced oscillations of the diaphragm of a loudspeaker. With a lock-in amplifier and data-acquisition system, the frequency response of the loudspeaker and its electrical impedance are automatically recorded versus frequency. From the measurements, it is easy to calculate electrical and mechanical parameters of the loudspeaker.
| Original language | English |
|---|---|
| Pages (from-to) | 567-579 |
| Number of pages | 13 |
| Journal | European Journal of Physics |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2009 |