True, yet I believe they are highly inaccurate, as I can hear the words when a male (deeper tone) speaks them in real life, than a woman (higher tone). When my ears are chirping or screaming at me, I can't hear my wife, but I can hear my friend. Obviously, it's subjective and they can only apply the law objectively. I have an exam coming up for new aids, and that puretone test is always a complete disaster, lol.