How To Detect If a Part Is Within Another Part?

I'm using a player's HumanoidRootPart to see if they are within a given 'zone' to play a certain sound based on whether they are within that zone, or outside of it.

The 'zone' is just an invisible Part that has CanCollide set to false.

I have this script setup that somewhat works:

local Player = game:GetService("Players").LocalPlayer
local HumanoidRootPart
local Humanoid

function Check()

    local Result = HumanoidRootPart.Touched:Wait()
    if Result.Name == "IndoorArea" then

        return true

    else

        return false

    end

end

Player.CharacterAdded:Connect(function(Character)

    HumanoidRootPart = Character:WaitForChild("HumanoidRootPart")
    Humanoid = Character:WaitForChild("Humanoid")
    while Humanoid.Health > 0 and Humanoid.Health ~= 0 do

        if Check() == true then

            print("In zone")

        else

            print("Outside zone")

        end
        wait()

    end

end)

(This script is located within StarterPlayerScripts, and is a local script)

This script works, but it sometimes detects that the player is outside the zone even when they are inside the zone and vice versa.

If anyone know how I can fix this script or a different method that is more viable than this one, help is much appreciated.

Thanks!