Bioinspired Low-Frequency Material Characterisation

Table 1

Material	Reference				Measured
	ρ/kg m^−3		c/ms^−1		Z/Mrayl	%𝑇	%𝑅	ρ/kg m^−3	Δρ (error)/kg m^−3
Water	998.1649 [32]		1482.955 [33]		1.48			996	1
Polypropylene (PP)	902–906 [34]		2600 [34]		2.35	95	5	901	11
PVC	1300–1400 [34]		2330 [34]		3.15	87	13	1441	19
Brass	8400–8500 [34]		4372 [34]		36.94	15	85	8406	435