#define HEARING_PROTECTION_OPEN EGVAR(hearing,protection) = 0; EGVAR(hearing,lowerVolume) = 0
#define HEARING_PROTECTION_VICCREW EGVAR(hearing,protection) = 0.85; EGVAR(hearing,lowerVolume) = 0.6
#define HEARING_PROTECTION_EARMUFF EGVAR(hearing,protection) = 0.75; EGVAR(hearing,lowerVolume) = 0.5
#define HEARING_PROTECTION_PELTOR EGVAR(hearing,protection) = 0.75; EGVAR(hearing,lowerVolume) = 0