Table 23: Analysis of the accuracies reported in the studies [⁶⁵-⁶⁸] using the accelerometer, the magnetometer and the gyroscope sensors.

Stages	Accelerometer Magnetometer Gyroscope	Accelerometer Magnetometer Gyroscope Microphone	Accelerometer Magnetometer Gyroscope Microphone GPS
Stage 1	89.51%	89.51%	89.51%
Stage 2	-	86.50%	86.50%
Stage 3	-	100.00%	100.00%
Overall	89.51%	92.00%	92.00%