Table 1.

Mechanical and elastic parameters of an S. aureus biofilm at 96 hours as determined by time-resolved high-frequency scanning acoustic microscopy

Structural and physical properties	Biofilm matrix
Thickness [μm]	127.23 ± 2.87
Ultrasound velocity [m/s]	1523.14 ± 12.01
Attenuation [Np/mm]	4.2 ± 0.18
Acoustic impedance [MRayl]	1.9 ± 0.01
Density [kg/m3]	1246.58 ± 11.48
Bulk modulus [GPa]	2.8 ± 2.9 × 10-5