Acoustic correction consists of reducing the sound level, in dB (decibels), of a certain environment, as well as reducing its reverberation time. The expanded cork agglomerate is an excellent material for the acoustic correction of certain environments, such as theater rooms, classrooms, showrooms, meeting rooms, etc. expanded cork agglomerate proves to be an excellent material for acoustic correction of certain environments such as theatres, classrooms, concert halls, meeting rooms, etc. Expanded cork agglomerate reduces the sound level through absorption effects, allowing a reduction in reverberation times.