## 3 Results  
The LVP performance through \(f_{in}\), \(P_{in}\), \(D_{in}\), \(a_{in}^{peak}\), and \(a_{in}^{RMS}\) are reported (Table 1). Regarding the LVP transmission, data are provided through \(a_{out}^{RMS}\) and \(T\) (Figure 4), and \(P_{out}\) (Table 2).  
Figure 3: Example of vibration signal at the ankle (blue line) and its corresponding RMS value (orange line).  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Body Site** &
\begin{tabular}{c} **Frequency** \\ **Setting (Hz)** \\ \end{tabular} & **Toe-Standing** & **Erect** & **High Squat** & **Deep Squat** & **Lunge** \\ \hline \multirow{4}{*}{Ankle} & 20 & 98.0 (1.7) & 98.5 (0.8) & 98.1 (1.5) & 98.2 (1.1) & 96.0 (1.6) \\  & 25 & 99.1 (0.7) & 98.9 (0.8) & 99.0 (0.8) & 99.0 (1.0) & 96.5 (2.7) \\  & 30 & 98.8 (1.1) & 99.5 (0.3) & 99.3 (0.4) & 99.3 (0.6) & 98.3 (1.4) \\  & 20 & 96.3 (3.4) & 99.1 (0.5) & 98.6 (1.5) & 97.8 (2.9) & 97.4 (2.0) \\ \multirow{2}{*}{Knee} & 25 & 98.2 (1.8) & 98.6 (0.9) & 98.0 (1.7) & 97.5 (2.6) & 97.0 (2.1) \\  & 30 & 97.4 (2.6) & 99.3 (0.3) & 98.7 (0.7) & 98.4 (1.3) & 97.3 (1.9) \\  & 20 & 74.5 (18.7) & 97.9 (1.7) & 94.8 (3.5) & 93.7 (3.6) & 77.2 (18.0) \\ \multirow{2}{*}{Hip} & 25 & 83.1 (9.0) & 96.0 (7.2) & 93.2 (4.0) & 95.6 (3.1) & 85.8 (9.1) \\  & 30 & 64.6 (16.0) & 96.5 (2.3) & 88.5 (9.9) & 91.6 (7.1) & 70.8 (16.8) \\ \multirow{2}{*}{L3} & 20 & 67.2 (22.1) & 98.5 (0.8) & 96.8 (2.3) & 89.2 (12.3) & 88.6 (14.4) \\  & 25 & 71.6 (17.7) & 97.8 (1.7) & 96.8 (2.0) & 92.0 (7.7) & 92.0 (7.1) \\ \multirow{2}{*}{L3} & 30 & 48.7 (16.8) & 97.3 (1.6) & 94.6 (6.3) & 78.4 (19.6) & 80.6 (10.5) \\  & 20 & 87.3 (9.8) & 99.0 (0.8) & 77.1 (20.3) & 90.3 (5.7) & 36.7 (21.4) \\ \multirow{2}{*}{Head} & 25 & 94.0 (4.0) & 99.1 (0.7) & 88.8 (9.3) & 84.7 (15.9) & 45.5 (26.6) \\  & 30 & 78.5 (16.5) & 98.6 (1.6) & 79.5 (14.3) & 82.0 (21.0) & 31.3 (22.7) \\ \hline \hline \end{tabular}
\end{table}
Table 2: Signal purity outputs at different body sites, frequencies, and across body positions. Data are provided in percentage (%) as mean (SD).  
Figure 4: _Cont._  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Frequency** & **LVP Inputs** & **Mean** & **TS** & **ER** & **HS** & **DS** & **LU** \\ \hline \multirow{4}{*}{20} & \(f_{\text{in}}\) (Hz) & 20.5 & 20.5 (0.0) & 20.5 (0.0) & 20.5 (0.0) & 20.5 (0.0) \\  & \(P_{\text{in}}\) (\%) & 99.6 & 99.5 (0.2) & 99.3 (0.3) & 99.7 (0.2) & 99.8 (0.1) & 99.7 (0.2) \\  & \(D_{\text{in}}\) (mm) & 1 & 1.0 (0.0) & 0.8 (0.1) & 1.0 (0.1) & 1.1 (0.1) & 1.1 (0.1) \\  & \(a_{\text{peak}}\) (g) & 0.8 & 0.9 (0.0) & 0.7 (0.1) & 0.9 (0.1) & 0.9 (0.1) & 0.9 (0.1) \\  & \(a_{\text{RMS}}\) (g) & 0.5 & 0.5 (0.0) & 0.4 (0.0) & 0.5 (0.0) & 0.5 (0.0) & 0.5 (0.0) \\ \hline \multirow{4}{*}{25} & \(f_{\text{in}}\) (Hz) & 25.4 & 25.4 (0.2) & 25.4 (0.2) & 25.5 (0.0) & 25.5 (0.0) & 25.4 (0.2) \\  & \(P_{\text{in}}\) (\%) & 99.4 & 99.1 (0.4) & 99.5 (0.3) & 99.6 (0.2) & 99.6 (0.2) & 99.3 (0.5) \\  & \(D_{\text{in}}\) (mm) & 1 & 1.0 (0.1) & 1.0 (0.1) & 0.9 (0.0) & 0.9 (0.0) & 1.0 (0.1) \\  & \(a_{\text{peak}}\) (g) & 1.2 & 1.4 (0.1) & 1.3 (0.1) & 1.2 (0.1) & 1.2 (0.1) & 1.3 (0.1) \\  & \(a_{\text{RMS}}\) (g) & 0.8 & 0.9 (0.0) & 0.8 (0.0) & 0.8 (0.0) & 0.7 (0.0) & 0.8 (0.0) \\ \hline \multirow{4}{*}{30} & \(f_{\text{in}}\) (Hz) & 30.5 & 30.5 (0.0) & 30.5 (0.0) & 30.5 (0.0) & 30.5 (0.0) & 30.5 (0.0) \\  & \(P_{\text{in}}\) (\%) & 99.7 & 99.5 (0.1) & 99.7 (0.1) & 99.7 (0.1) & 99.7 (0.1) & 99.7 (0.1) \\ \multirow{2}{*}{30} & \(D_{\text{in}}\) (mm) & 0.6 & 0.7 (0.0) & 0.6 (0.0) & 0.6 (0.0) & 0.6 (0.0) & 0.6 (0.1) \\  & \(a_{\text{peak}}\) (g) & 1.1 & 1.2 (0.0) & 1.1 (0.1) & 1.1 (0.0) & 1.0 (0.0) & 1.1 (0.1) \\  & \(a_{\text{RMS}}\) (g) & 0.6 & 0.7 (0.0) & 0.6 (0.0) &