Table 1.

Measured acoustic properties of gel wax, in which the only additive was paraffin wax. Each property (mean  ±  standard deviation) was obtained from measurements from five distinct regions. Acoustic attenuation as a function of frequency (f) is depicted by the power law curve (${\alpha }_0{f}^n$), with parameters obtained from non-linear least squares fitting.

Paraffin wax concentration (w/w%)	Acoustic attenuation ${\alpha }_0{f}^n$ (dB cm−1)		Speed of sound cs (m s−1)
	${\alpha }_0$	$n$
0	0.080  ±  0.007	1.93  ±  0.06	1448.5  ±  0.8
2	0.117  ±  0.004	1.86  ±  0.03	1447.9  ±  0.5
4	0.156  ±  0.003	1.86  ±  0.01	1447.9  ±  1.1
6	0.142  ±  0.022	2.09  ±  0.07	1448.4  ±  1.7
8	0.348  ±  0.063	1.88  ±  0.10	1443.1  ±  1.5