Can you explain why magnets soothe certain types of pain?
Can you point to studies that indicate they do?
You know what the funny thing is about science? Science can't prove why some people can hear things other people can't. Its not a matter of "since I can't hear it, it must not exist", its simply a matter of "I can't hear it"
It can be used though to determine if the person really heard it. I can think of a number of reasons such as expectation biases, selective auditory focussing, poor room acoustics and where you listen, mood, extent of concentration, health, etc. Don't forget the movie, "A Perfect Mind".