## 3 Results
### Acoustic Modeling
#### 3.3.3 Performance Evaluation  
In the detailed performance evaluation of the sound event detection algorithm, various aspects are analyzed to understand the effectiveness and limitations of this work. In the confusion matrix of Table 6, the performance of the sound event detection algorithm on Data Set 1 is evaluated. Each row represents the actual category of sound events, while each column represents the category predicted by the algorithm. Types include \"Screams\", \"Voices\", \"Traffic\", \"Bell\", \"Whistle\", and \"No Event\". In screams, 850 \"Screams\" type events were correctly detected as \"Screams\". However, there were some errors in the classification, where 20 \"Screaming\" events were misclassified as \"Voices\", 5 as \"Traffic\", 5 as \"Bell\", 10 as \"Whistle\", and 25 as \"No Event\". In voices, similarly, the algorithm achieved high accuracy in detecting events of the type \"Voices\", with 880 events correctly classified as \"Voices\". However, there were errors in the classification, such as 10 \"Voices\" events being misclassified as \"Screams\", 15 as \"Traffic\", 20 as \"Bell\", 5 as \"Whistle\", and 30 as \"No Event\". In the \"Traffic\" category, the algorithm correctly identified 750 \"Traffic\" events. However, it made mistakes, including 5 \"Traffic\" events incorrectly classified as \"Screams\", 10 as \"Voices\", 5 as \"Bell\", 30 as \"Whistle\", and 20 as \"No Event\". For the \"Doorbell\" category, the algorithm correctly detected 900 events of this type. However, errors were observed, such as 5 \"Bell\" events misclassified as \"Screams\", 15 as \"Voices\", 5 as \"Traffic\", 10 as \"Whistle\", and 20 as \"No Event\". In the \"Whistle\" category, the algorithm accurately detected 850 such events. There were a few errors, though, such as 8 \"Whistle\" events incorrectly classified as \"Screams\", 5 as \"Voices\", 12 as \"Traffic\", 6 as \"Bell\", and 15 as \"No Event\". The algorithm also correctly identified the absence of audible events in the \"No Event\" category, with 950 cases adequately classified as such. It did make mistakes, though, including 30 misclassified as \"Screams\", 25 as \"Voices\", 10 as \"Traffic\", 15 as \"Bell\", and 20 as \"Whistle\". In Table 7 of the confusion matrix, the algorithm's performance is evaluated, as in the previous matrix, each row represents the actual category of sound events, and each column represents the category predicted by the algorithm. The algorithm correctly detected 920 \"Screams\" type events as \"Screams\". There were errors, such as 15 \"Screaming\" events misclassified as \"Voices\", 10 as \"Traffic\", 8 as \"Bell\", 5 as \"Whistle\", and 20 as \"No Event\". The algorithm achieved high accuracy in the \"Voices\" category by correctly identifying 930 \"Voices\" events. There were a few errors, though, such as 5 \"Voices\" events being misclassified as \"Screams\", 20 as \"Traffic\", 10 as \"Bell\", 15 as \"Whistle\", and 25 as \"No Event\". The algorithm correctly detected 900 \"Traffic\" type events as \"Traffic\". However, \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Actual Category** & **Screams** & **Voices** & **Traffic** & **Timbre** & **Whistling** & **No Event** \\ \hline Screams & 850 & 20 & 5 & 5 & 10 & 25 \\ Voices & 10 & 880 & 15 & 20 & 5 & 30 \\ Traffic & 5 & 10 & 750 & 5 & 30 & 20 \\ Timbre & 5 & 15 & 5 & 900 & 10 & 20 \\ Whistling & 8 & 5 & 12 & 6 & 850 & 15 \\ No Event & 30 & 25 & 10 & 15 & 20 & 950 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Confusion matrix of sound event detection by category (Data Set 1). errors were observed, such as 8 \"Traffic\" events incorrectly classified as \"Screams\", 12 as \"Voices\", 5 as \"Bell\", 20 as \"Whistle\", and 15 as \"No Event\". For the \"Doorbell\" category, the algorithm detected 950 such events correctly. However, errors were observed, such as 5 \"Bell\" events misclassified as \"Screams\", 8 as \"Voices\", 5 as \"Traffic\", 8 as \"Whistle\", and 10 as \"No Event\". In the \"Whistle\" category, the algorithm accurately detected 920 such events.