    ---------------------------------------------------------------------------
    APPENDIX PM2 - FREY'S PAPER

## Human Auditory System Response To Modulated Electromagnetic Energy

## ALLAN H. FREY

### General Electric Advanced Electronics Center Cornell University Ithaca, New York

    TRANSCRIPTION, Courtesy of MindNet Archives, Mike Coyle
    posted at http://www.ritualabuse.net/MCF/

    Frey, Allan H., Human Auditory system response to modulated
    electromagnetic energy. J. Appl. Physiol. 17(4): 689-692.  1962.

    (*) Asterisks indicate unreadable characters in the original copy.

    NOTE:  In 1962, frequencies were expressed as kiloCYCLES,
    megaCYCLES, etc., with abbreviations being kc, mc

    --The intent of this paper is to bring a new phenomena to the
    attention of physiologists.  Using extremely low average power
    densities of electromagnetic energy, the perception of sounds was
    induced in normal and deaf humans.  The effect was induced several
    hundred feet from the antenna the instant the transmitter was turned
    on, and is a function of carrier frequency and modulation. Attempts
    were made to match the sounds induced by electromagnetic energy and
    acoustic energy.

    The closest match occurred when the acoustic amplifier was driven by
    the rf transmitter's modulator. Peak power density is a critical
    factor and, with acoustic noise of approximately 80 db, a peak power
    density of approximately 275 mw / rf is needed to induce the
    perception at carrier frequencies 125 mc and 1,310 mc.  The average
    power density can be at rf as low as 400 _u_w/cm2.  The evidence for
    the various positive sites of the electromagnetic energy sensor are
    discussed and locations peripheral to the cochlea are ruled out.

    Received for publication 29 September 1961.

    A significant amount of research has been conducted with the effects
    of radio-frequency (rf) energy on organisms (electro- magnetic energy
    between 1 kc and ** Gc). Typically, this work has been concerned with
    determining damage resulting from body temperature increase.  The
    average power densities used have been on the order of 0.1-t w/cm2
    used over many minutes to several hours.

                                    -32-