local meta = FindMetaTable("Player")
// http://wiki.garrysmod.com/page/Enums/IN <-- Key replacement
function meta:getRadio()
	local char = self:getChar()
	local inv = char:getInv():getItems()

	if char then
		local freq = nil

		for id,item in pairs(inv) do
			if item.uniqueID == "radio" and item:getData("power", false) == true then
				freq = item:getData("freq", "000.0")
				break
			end
		end

		if freq then
			return freq
		end
	end
end

hook.Add( "PlayerCanHearPlayersVoice", "dsftgjhdfghjfdghjfghj", function( ply, spk )
	local key = IN_WALK // NOT IN VEHICLE KEY
	if spk:InVehicle() then
		key = IN_DUCK // IN VEHICLE KEY
	end
	local freq = spk:getRadio()
	local freq2 = ply:getRadio()

	if freq then
		if freq2 then
			if freq == freq2 then
				if spk:KeyDown(key) then
					return true
				end
			end
		end
	end
end )