ABSTRACT
When we model acoustical circuits, representing the physical world of pipes, orices, diaphragms, etc., we use acoustical components to simplify the understanding of the operation of the circuits. The acoustical circuit elements are two-ports or fourports that can be characterized by the acoustical eld variables, volume ow, and sound pressure, at their ports. As with mechanical circuits there are a number of common circuit elements. These can be represented in the physical world by their corresponding acoustical components. For example, compliance in the acoustical circuit will be represented in the physical world by a volume of a compressible uid, a gas, in a closed cavity.
