Sound attenuating chimney element for a turbomachine system

A turbomachine system comprising:

• a compressor portion;
• a turbine portion fluidically connected to the compressor portion;
• a fluid duct fluidically coupled to one of the compressor portion and the turbine portion;
• and
• a sound attenuating chimney element mechanically linked to the fluid duct, the sound attenuating chimney element comprising:
• a high density outer body including an external surface and an internal surface;
• one or more acoustic attenuation layers provided on the internal surface of the high density outer body, the one or more acoustic attenuation layers including an outer surface portion and an inner surface portion;
• and
• a structural layer comprising concrete provided on the inner surface portion of the one or more acoustic attenuation layers the structural layer including an internal surface section that defines a duct configured and disposed to pass exhaust gases from the turbomachine system.