An integrated noise suppression acoustic panel includes a back plate, a
face plate, and a bulk foam absorber disposed between the back plate and
the face plate. The bulk foam absorber is formed of a thermoset material,
such as bismaleimide or phenolic, and is manufactured using a low
pressure process. In particular, a foamable material is melted, and a
blowing agent is mixed with the foamable material to obtain a mixture.
The foam is formed and the mixture is cured by heating it to a
temperature, and maintaining the mixture at the temperature for a time
sufficient to cure the mixture.