Table 22: Analysis of the accuracies reported in the studies [⁶⁵-⁶⁸] using the accelerometer and the magnetometer sensors.

Stages	Accelerometer Magnetometer	Accelerometer Magnetometer Microphone	Accelerometer Magnetometer Microphone GPS
Stage 1	86.49%	86.49%	86.49%
Stage 2	-	86.50%	86.50%
Stage 3	-	100.00%	100.00%
Overall	86.49%	91.00%	91.00%