An improved inlet silencer/filter for an oxygen concentrator includes a
HEPA filter and an adjoining chamber for receiving air flow from the HEPA
filter. The chamber is surrounded on one face by the HEPA filter, and by
sound absorbing padding on at least 4 other faces. Air is forced from the
HEPA filter, through the open chamber and then through the sound absorbing
padding by a flow restrictor plate. Air flows from here through air
channels and into an open chamber leading to an outlet from the air
silencer/filter.
