Methods and systems for detecting and managing unexpected spectral content in an amplifier system

A method comprising:

• receiving, by a transducer driving system, a first signal for driving an amplifier that drives an electromagnetic load;
• receiving, by the transducer driving system, a second signal driven by the amplifier in order to control a feedback loop of the transducer driving system;
• detecting unexpected spectral content in the second signal;
• in response to detecting the unexpected spectral content, modifying a system behavior of the transducer driving system by:
• monitoring the unexpected spectral content and the second signal for patterns that identify a physical damage of the electromagnetic load;
• and
• modifying a signal gain applied to the first signal to protect the transducer driving system.

A transducer driving system, comprising:

• a driver output for driving an amplifier that drives an electromagnetic load;
• a feedback input for receiving a signal driven by the amplifier in order to control a feedback loop of the transducer driving system;
• and
• an unexpected spectral content detector and controller subsystem configured to:
• detect unexpected spectral content in the signal;
• declare an indicator event based on the detected unexpected spectral content;
• determine whether the indicator event occurs in an undesired pattern;
• and
• in response to the indicator event occurring in the undesired pattern, modify a behavior of the transducer driving system.

A transducer driving system comprising:

• a driver output for driving an amplifier that drives an electromagnetic load;
• a feedback input for receiving a first signal driven by the amplifier in order to control a feedback loop of the transducer driving system;
• and
• an unexpected spectral content detector and controller subsystem configured to:
• detect unexpected spectral content in the signal;
• and
• in response to detecting the unexpected spectral content, modify a system behavior of the transducer driving system by:
• monitoring the unexpected spectral content and a second signal for patterns that identify a physical damage of the electromagnetic load;
• and
• modifying a signal gain applied to the first signal to protect the transducer driving system.