24.1.4—The specific acoustic impedance of a medium as Z = ρc

define the specific acoustic impedance of a medium as Z = ρc, where c is the speed of sound in the medium.

Use —the specific acoustic impedance of a medium as z = ρc to connect the rule to the data and decision in the question.

This matters because —the specific acoustic impedance of a medium as z = ρc determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the specific acoustic impedance of a medium as z = ρc to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The specific acoustic impedance of a medium as Z = ρc is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.