Z = 1.4770 MRayl (in the range of water and soft biological tissue)
Acoustic impedance equals density times speed of sound. A material with higher density and higher wave speed resists sound transfer more strongly.
Large impedance mismatches between two media cause strong reflection and poor transmission, which is the principle behind ultrasound gel and soundproofing barriers.
At 1.4770 MRayl this material is a moderate acoustic mirror relative to air.
Next stepUse the reflection and transmission mode to see how much sound crosses the boundary between this material and another.