System for using digital signal processing to compensate for power compression of loudspeakers

A method for preventing a voice coil from overheating, comprising:

• predicting power being delivered to a voice coil based on an input signal representative of voltage being fed to a loudspeaker;
• estimating a temperature based on a thermal-model with predicted power to the voice coil as an input signal;
• and
• providing a gain reduction to a voltage drive that limits a predetermined maximum temperature the voice coil can achieve.

A method for compensating for temperature dependent performance degradation in a loudspeaker, comprising:

• using a fast fourier transform (FFT) algorithm to calculate power versus frequency information;
• estimating a temperature for a voice coil within a loudspeaker based on a thermal-model based on the power versus frequency information to modify a thermal resistance of a voice coil;
• and
• applying a filter to the loudspeaker for compensating a difference between a frequency response at a given temperature and a predetermined frequency response at a room temperature.

The method for preventing a coil from overheating, comprising:

• predicting power being delivered to a coil based on an input signal representative of voltage being fed to an electro-dynamic motor;
• estimating a temperature based on a thermal-model with predicted power to the coil as an input signal;
• and
• providing a gain reduction to a voltage drive that limits a predetermined maximum temperature the coil can achieve.

The method for compensating for temperature dependent performance degradation in an electrodynamic motor due to the heating of a coil, comprising:

• predicting power being delivered to a coil based on an input signal representative of the voltage being fed to a motor;
• estimating a temperature for the coil based on a thermal model that accounts for a cooling effect based on movement of the coil;
• and
• applying input signal modifications to create a linear relationship between the input signal and output power.