#$%^&*AU2019250147A120191031.pdf#####ABSTRACT There is disclosed a waste collection unit for collecting waste material through a suction line during a medical procedure, said waste collection unit comprising: a waste container configured to be in fluid communication with the suction line to collect the waste material during the medical procedure, said waste container defining a collection chamber and a vacuum port； a vacuum source in selective communication with said vacuum port of said waste container for providing a vacuum in said waste container to draw the waste material into said waste container through the suction line, said vacuum source defining a vacuum passage to carry air through said vacuum source wherein said vacuum passage has a vacuum inlet for receiving the air and a vacuum outlet for directing the air from said vacuum source； and a sound attenuating enclosure in which said vacuum source is disposed, said sound attenuating enclosure defining an enclosure inlet for receiving cooling air to cool the vacuum source and an enclosure outlet for discharging warmed cooling air from said sound attenuating enclosure, wherein said sound attenuating enclosure comprises a first section at least partially formed of a first sound-absorbing material configured to attenuate noise generated by said vacuum source during operation, said first section having an interior surface with geometric features formed therein to accommodate said vacuum source and define a cooling air path for the cooling air.
