Described herein is an acoustical building panel that comprises a body formed from a first component comprising a fibrous material, and a binder; and a second component comprising pellets of a recycled material, wherein the second component is present in an amount ranging from about 25 wt. % to about 45 wt. % based on the total weight of the body.

A modular pod includes a door, walls, and a ceiling, with the walls containing an insulation product for acoustic insulation. The exterior surface of the walls can be covered in a recycled non-woven felt material. A ventilation system is provided, including a ventilation plinth located at the base of at least one wall inside the pod and at least one exhaust fan in the ceiling for exhausting air out of the pod. The ventilation plinth is an elongated channel with openings on both the exterior and interior sides of the pod. The interior walls of the channel of the ventilation plinth are lined with an acoustic dampener to minimize the entry of noise through the air inlet of the ventilation. The pod's construction allows for assembly entirely from the interior, allowing it to be installed against a wall or in a corner.

A composite material for manufacturing an insulation brick comprising a filler obtained from recycled fiberglass and a silicate base binder, the filler being a fiberglass powder with particle size lower than 500 m.