Sound absorber for an auxiliary engine of an aircraft

The sound absorber (2) has an inlet (46), an outlet (48), a housing (4), and a flow channel (6) which has a porous wall material and is arranged in the housing. An intermediate space is formed between the housing and the flow channel. The intermediate space is divided into outer cells (10,12,14,16,18,20,22,24,26) arranged around the flow channel by one or multiple partitions (8).