    The third likely place for the detection mechanism is the brain. Burr
    and Mauro (6) presented evidence that indicates that there is an
    electrostatic field about neurons.  Morrow and Sepiel (7) presented
    evidence that indicates the existence of a magnetic field about
    neurons.  Becker (personal communication) has done some work
    indicating that there is longitudinal flow of charged carriers in
    neurons.  Thus, it is reasonable to suspect that possibly the
    electromagnetic field could interact with neuron fields.  As yet,
    evidence of this possibility is inconclusive.  The strongest point
    against it is that we have not found visual effects although we have
    searched for them.  On the other hand, we have obtained other
    nonauditory effects and have found that the sensitive area for
    detecting rf sounds is a region over the temporal lobe of the brain.
    One can shield, with a 2-in.2 piece of fly screen, a portion of the
    stippled area shown in Fig. 6 and completely cut off the rf sound.

    Another possibility should also be considered.  There is no good
    reason to assume that there is only one detector site.  On the
    contrary, the work of Jones et al. (8), in which they placed
    electrodes in the ear and electrically stimulated the subject, is
    sufficiently relevant to suggest the possibility of more than one
    detector site. Also, several sensations have been elicited with
    properly modulated electromagnetic energy.  It is doubtful that all
    of these can be attributed to one detector.

    As mentioned earlier, the purpose of this paper is to focus the
    attention of physiologists on an unusual area and stimulate
    additional work on which interpretations can be based.
    Interpretations have been deliberately omitted from this paper since
    additional data are needed before a clear picture can emerge. It is
    hoped that the additional exploration will also result in an increase
    in our knowledge of nervous system functions.

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