Arborists work around loud chainsaws (110db) and wood chippers (129db). The current Sena hearing protection is only rated to Class 4 and therefor can’t be used in compliance with Occupational Health and Safety Standards. Currently Sena units have to be purchased, pulled apart and retro fitted into Class 5 ear muffs. Can Sena please manufacture the units into Class 5 earmuffs in compliance with Australian Standards. Is it also possible to have a 5th person connected?