No one can see X-rays (or infrared, or ultraviolet, or microwaves). It doesn't matter how much a person believes he can. Retinas simply don't have the sensory hardware.
The author seems to have stumbled into a poor example, as a recent study shows that humans can indeed see infrared light using an unexpected process. Should we read anything into the audio case from this? Probably not, but it's a sign that even those who are sure they are right because they have science on their side should retain some degree of openmindedness.
Human infrared vision is triggered by two-photon chromophore isomerization
This study resolves a long-standing question about the
ability of humans to perceive near infrared radiation (IR)
and identifies a mechanism driving human IR vision. A few
previous reports and our expanded psychophysical studies
here reveal that humans can detect IR at wavelengths longer
than 1,000 nm and perceive it as visible light, a finding
that has not received a satisfactory physical explanation.
We show that IR light activates photoreceptors through a
nonlinear optical process. IR light also caused
photoisomerization of purified pigments and a model
chromophore compound. These observations are consistent
with our quantum mechanical model for the energetics of
two-photon activation of rhodopsin. Thus, humans can
perceive IR light via two-photon isomerization of visual
pigment chromophores.
The author seems to have stumbled into a poor example, as a recent study shows that humans can indeed see infrared light using an unexpected process. Should we read anything into the audio case from this? Probably not, but it's a sign that even those who are sure they are right because they have science on their side should retain some degree of openmindedness.
http://www.pnas.org/content/early/2014/11/25/1410162111