Table 2.

Sampling period analysis (when removing the first sample).

Smart Phone Type	Sampling Period (s)	Mean (dBA)	$\overline{{\mathit{ϵ}}_{\mathit{s}}}$ $(\%)$	Std. Dev.
Samsung S7 Edge	1	65.1229	0.0052	0.2355
	2	65.7344	0.0056	0.1382
	3	65.8856	0.0078	0.0979
	5	65.9405	0.0097	0.0890
BQ Aquaris	1	66.5757	0.0172	0.2270
	2	65.9599	0.0091	0.2128
	3	65.7659	0.0059	0.1880
	5	65.6615	0.0054	0.1506