# A Planer Moving Microphone Array for Sound Source Localization
## 3 Experiment and Results
\begin{table}
\begin{tabular}{l l l l} \hline \hline
**Target Number = 4** & **TF-WISE** & **MUSIC** & **SRP-PHAT** \\ \hline FPMMS & 86\% & 78\% & 80\% \\ \hline Circular Array & 98\% & 95\% & 94\% \\ \hline \(1\times 4\) Microphone Array & 78\% & 68\% & 72\% \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Four-target estimation success rate table. Figure 26: TF-WISE results regarding planar distance estimation at angles of 30°, 60°, 90°, 120°, and 150°; a distance of 2 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. \begin{table}
\begin{tabular}{l l l l} \hline \hline
**Target Number = 5** & **TF-WISE** & **MUSIC** & **SRP-PHAT** \\ \hline FPMMS & 75\% & 70\% & 71\% \\ \hline Circular Array & 85\% & 80\% & 78\% \\ \hline \(1\times 4\) Microphone Array & 64\% & 63\% & 62\% \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Five-target estimation success rate table. Figure 25: TF-WISE results regarding planar distance estimation at angles of 30°, 60°, 90°, 120°, and 150°; a distance of 1.5 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 28: MUSIC results of planar distance estimation at angles of 30\({}^{\circ}\), 60\({}^{\circ}\), 90\({}^{\circ}\), 120\({}^{\circ}\), and 150\({}^{\circ}\); a distance of 2 m\({}_{\rm{j}}\) and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 27: MUSIC results regarding planar distance estimation at angles of 30\({}^{\circ}\), 60\({}^{\circ}\), 90\({}^{\circ}\), 120\({}^{\circ}\), and 150\({}^{\circ}\); a distance of 1.5 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 28: MUSIC results of planar distance estimation at angles of 30\({}^{\circ}\), 60\({}^{\circ}\), 90\({}^{\circ}\), 120\({}^{\circ}\), and 150\({}^{\circ}\); a distance of 2 m\({}_{\rm{j}}\) and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 31: A flow chart of the third experiment. For FPMMS, signals from different pattern pairs were used for height estimation. The audio signal is multi-channel; Thus, the Audio signal part would be overlapped by different colors. Figure 32: TF-WISE sound sources for vertical height estimation at angles of 30°, 60°, 90°, 120°, and 150°, a distance of 1.5 m; and a height of 0.7 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 30: SRP-PHAT results of planar distance estimation at angles of 30°, 60°, 90°, 120°, and 150°, a distance of 2 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 33: TF-WISE sound sources for vertical height estimation at angles of 30\({}^{{}^{\prime}}\), 60\({}^{{}^{\prime}}\), 90\({}^{{}^{\prime}}\), 120\({}^{{}^{\prime}}\), and 150\({}^{{}^{\prime}}\); a distance of 1.5 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 34: MUSIC sound sources for vertical height estimation at angles of 30\({}^{{}^{\prime}}\), 60\({}^{{}^{\prime}}\), 90\({}^{{}^{\prime}}\), 120\({}^{{}^{\prime}}\), and 150\({}^{{}^{\prime}}\); a distance of 1.5 m; a height of 0.7 m. The lower part shows the intuitive estimation error relative to the true distance. Figure 25:0 MUSIC sound sources for vertical height estimation at angles of 30\({}^{{}^{\prime}}\), 60\({}^{{}^{\prime}}\), 90\({}^{{}^{\prime}}\), 120\({}^{{}^{\prime}}\), and 150\({}^{{}^{\prime}}\); a distance of 1.5 m; and a height of 1.5 m. The lower part shows the intuitive estimation error relative to the true distance. In summary, the proposed FPMMS' performance ranked second when compared alongside the active microphone arrays in terms of direction, distance, and height estimation. Compared to the other structures, FPMMS uses fewer microphones and less space, which is what we hoped for.