Mitigating an induced electrical signal from an appliance in a powered-off state

An isolation unit, comprising:

• input pins, configured to receive an induced electrical signal that is induced by ambient sound waves incident on an appliance when the appliance is in a powered-off state;
• one or more first transformers, connected to at least a portion of the input pins, configured to electrically isolate the induced electrical signal;
• one or more second transformers, connected to the one or more first transformers, configured to receive the induced electrical signal from the one or more first transformers, and further configured to provide a common mode choke function on the induced electrical signal;
• one or more inductors, connected to the one or more second transformers, and one or more resistors, connected to the one or more inductors, wherein the one or more inductors and the one or more resistors are configured to limit an amplitude of a current of the induced electrical signal;
• and
• output pins, connected to the one or more inductors, configured to receive a modified electrical signal from the one or more inductors, and configured to propagate the modified electrical signal to a downstream cable.