HP P34hc G4 speaker adapter/inverter for sound improvement

I created the inverter/sound directional adapters (not really sure what to call it) to improve the sound quality when having my HP P34hc G4 monitor standing in an open area without a wall behind.

Can be attached with glue our double-sided tape.

Designed so it can be printed standing up and suggest to use variable layer height at start and end to improve quality of the radii.