if (height < 150) then
            vDist = 1-((150-height)/100)
        elseif (height > 150) and (height < 330) then
            vDist = ((330-height)/180)
        end

        local hVol = 1-(hDist/700)

        soundVolume = soundVolume*vDist*hVol

        if IsPedInAnyVehicle(GetPlayerPed(-1), false) then
            soundVolume = soundVolume*0.5
        end

		if (height < 330) and (height > 150) and (hDist < 700) then
		  	SendNUIMessage({
                transactionType     = 'npas',
                transactionVolume   = soundVolume
        	})
		end