B. Event Detection Accuracy
We evaluate the accuracy of using the HMM approach for
event detection (Sec. IV-A) with two different metrics. For all
the sound frames contained in a sample, we define:
• T P: the number of event frames correctly recognized;
• FN: the number of event frames falsely recognized;
• FP: the number of non-event frames falsely recognized;
• T N: the number of non-event frames correctly
recognized.