Method and system for mechanical protection and nonlinear compensation of loudspeaker systems

A method for mechanically protecting a loudspeaker comprising a driver and either a passive radiator or a vent port, the method comprising:

• determining at least one of a displacement of the driver, a displacement of the passive radiator, and a velocity of airflow through the vent port based on an input voltage representing an audible sound;
• determining an output voltage for the loudspeaker to reproduce the audible sound according to a single type of compression applied to both the driver displacement and either the passive radiator displacement or the vent port airflow velocity;
• and
• providing the output voltage to the loudspeaker to limit the driver displacement within a driver displacement range and to simultaneously limit the passive radiator displacement within a passive radiator displacement range or the vent port airflow velocity within a vent port airflow velocity range to mechanically protect the loudspeaker and reduce distortion of the audible sound reproduced by the loudspeaker.

A non-transitory computer readable medium having stored computer executable instructions for mechanically protecting a loudspeaker comprising a driver and either a passive radiator or a vent port, wherein execution of the instructions causes a controller to:

• determine at least one of a displacement of the driver, a displacement of the passive radiator, and a velocity of airflow through the vent port based on an input voltage representing an audible sound;
• determine an output voltage for the loudspeaker to reproduce the audible sound according to a single type of compression applied to both the driver displacement and either the passive radiator displacement or the vent port airflow velocity;
• and
• provide the output voltage to the loudspeaker to limit the driver displacement within a driver displacement range and to simultaneously limit the passive radiator displacement within a passive radiator displacement range or the vent port airflow velocity within a vent port airflow velocity range to mechanically protect the loudspeaker and reduce distortion of the audible sound reproduced by the loudspeaker.