Standard Elements

Standard Two-Port Elements
Pipe (Hard walled, can be filled with porous material).
Horn.
Quarter Wave-Length Resonator.
Helmholtz Resonator.
Catalytic Converter (decrease the contents of harmful exhaust gases)
Diesel Particulate Filter (DPF reduces the harmful emission of soot particles from diesel engines).
Lined Duct (with porous material)
Sudden Area Expansion and Contraction
Expansion Chamber (concentric extended inlet and outlet).
Area Constriction.
  1. Lumped Elements (Inline or shunted).
  2. Perforate (lumped impedance element) .
  3. User-Defined transfer matrix as a function of frequency.

Standard One-Port Elements
  1. Reflection Free pipe termination.
  2. Free space pipe termination.
  3. Baffled pipe termination.
  4. Frequency independent impedance.
  5. User-Defined frequency dependent impedance.

Active Sources
  1. Frequency independent pressure source.
  2. User-Defined frequency dependent pressure source .