Patent ID: 8978654
Filing Date: 2015-03-17
Classification: A61M,A62B,A63B

Abstract:
1. A personal air filter device for use in providing a respiratory feedback when inhaling and exhaling, the filter comprising: (a) a housing defining a cavity and having a forward end vent and a rearward end vent, the rearward end vent being spaced apart from the forward end vent and disposed within a central opening in the housing, the forward end and rearward end vents being disposed downstream of the cavity relative to incoming air during inhalation, each vent having a first side facing the cavity, and a second side facing away from the cavity; (b) a mouthpiece adjacent to the second side of the forward end vent, and spaced apart from the central opening; (c) a cover of the housing extending from the mouthpiece to a rearward end of the housing, the cover surrounding the central opening and the cavity, the cover including an oscillating membrane adapted to oscillate at audible frequencies of a user's voice vibrations, the oscillating membrane and the cavity configured to amplify a user's voice vibrations at audible frequencies, and (d) a filter within the housing between the forward end and rearward end vents for filtering air passing through the housing when inhaling or exhaling, wherein the cavity resonates at audible frequencies for providing the respiratory feedback when a user exhales or inhales.