Table 3a.

The acoustical and physical features of water, propylene glycol, and polyethylene glycol at increase both the concentrations of the items at temperature 37°C±1°C

Number of sample	Water	Propylene glycol	Polyethylene glycol	Density (g/ml)	Speed of sound (m/s)	Viscosity (mPas)
1	100	0	0	0.998	1508	0.890
2	90	6	4	1.008	1485	2.2
3	85	9	6	1.013	1535	2.7
4	80	12	8	1.02	1550	4.2
5	70	20	10	1.03	1591	6.8
6	60	25	15	1.04	1629	9.7
7	50	30	20	1.05	1660	15.0