Acoustic grid participation is an important diagnostic tool for understanding what area
of the structure contributes significantly to the interior acoustic response.
This understanding will then allow you to determine what
potential design changes can help reduce the acoustic response.
Acoustic grid participation
is a way to break down an acoustic response to contributions from grids on the
fluid-structure interface (see below): Figure 1.
Structure grid participation
Provides participations from the body structure side of the fluid-structure
interface.
Fluid grid participation
Provides participations from the interior cavity side of the interface.
Physical
The body structure grids vibrate, exciting the interior cavity fluid grids, which
eventually generates an acoustic response (which is typically a driver’s or
passenger’s response).
Note: Both Structure and Fluid grid participations are acoustic grid participations. The
word ‘acoustic’ in ‘acoustic grid participation’ relates to the fact that the response is
acoustic (or pertains to sound).
