| 摘要 |
A control signal is generated for mechanical loudspeaker protection, or for other signal pre-processing functions. A calibration procedure contains the following steps:
- compute a normalised loudspeaker model, on the basis of recordings of the voltage across and the current flowing into the voice coil;
- perform a non-linearity analysis to determine the point where the diaphragm displacement reaches its maximally allowable value;
- compute the normalised excursion (from the normalised loudspeaker model) that corresponds to the signal for which the displacement limit is reached. A control signal that is to be used in combination with a loudspeaker protection module can be then computed for an arbitrary voltage signal. |
