System and method for monitoring a wind turbine

A wind turbine comprising:

• a tower;
• a nacelle housing coupled to the tower;
• a rotor coupled to the nacelle housing;
• a first acoustic sensor, disposed within the nacelle housing, to detect a sound emanating from a location within the nacelle housing of the wind turbine;
• and
• a first optical sensor, disposed within the nacelle housing, to image the location within the nacelle housing of the wind turbine in response to the first acoustic sensor detecting the sound.

A method of monitoring a wind turbine having a plurality of components including:

• (i) a tower, (ii) a nacelle housing coupled to the tower, (iii) a rotor, coupled to the nacelle housing, (4) a first acoustic sensor, and (5) a first optical sensor, the method comprising:
• detecting an operating acoustic spectrum generated by at least one of the components during operation of the wind turbine;
• comparing the operating acoustic spectrum to a reference acoustic spectrum;
• detecting a deviation between the operating acoustic spectrum and the reference acoustic spectrum;
• determining whether the deviation between the operating acoustic spectrum and the reference acoustic spectrum exceeds a threshold;
• and
• imaging at least a portion of the component that generated the operating acoustic spectrum when the deviation between the operating acoustic spectrum and the reference acoustic spectrum exceeds the threshold.