System and method for using sound to monitor the operation of a dryer appliance

A dryer appliance comprising:

• a cabinet;
• a drum rotatably mounted within the cabinet, the drum defining a chamber for receipt of clothes for drying;
• a microphone for monitoring sound generated during operation of the dryer appliance;
• and
• a controller operably coupled to the microphone, the controller being configured to:
• obtain a sound signal generated during operation of the dryer appliance using the microphone;
• generate a spectrogram from the sound signal, the spectrogram representing a sound frequency and a sound amplitude over time;
• identify a sound signature by analyzing the spectrogram using an image recognition process;
• and
• adjust at least one operating parameter of the dryer appliance based at least in part on identification of the sound signature.