Envelope and Wavelet Transform for Sound Localisation at Low Sampling Rates in Wireless Sensor Networks

Table 1

Averages (AVGs) and standard deviations (STDs) of estimated propagation path differences (PPDs) for 15 experiments.

Configuration of SN1 SN2 SN3		Actual PPDs (cm)	Estimated PPDs (cm)
			CC		EWTCC		EWTCC- Fitting
			AVG	STD	AVG	STD	AVG	STD
𝑃2𝑃2𝑃2	𝑑𝑚	00.00	6.14	3.07	1.83	1.17	1.15	0.81
	𝑑𝑛	00.00	2.56	4.58	1.96	1.87	1.27	1.06
𝑃0𝑃2𝑃3	𝑑𝑚	15.00	12.26	5.65	14.10	3.53	15.19	2.64
	𝑑𝑛	36.00	26.41	20.62	37.11	3.89	36.49	3.71
𝑃1𝑃2𝑃3	𝑑𝑚	21.00	23.11	9.44	22.95	5.02	21.40	4.12
	𝑑𝑛	15.00	12.26	10.51	16.55	5.69	15.65	4.53