2. With the transmitter antenna enclosed in a radome and not visible to the subject, the antenna was rotated at various rates. Thus, the RF beam swept by the subject several times a minute. The subjects invariably perceived when they were swept by the RF beam. 3. Subjects we re blindfolded and the beam was broken repeatedly in an irregular fashion by interposing a screen shield between the source and the subject. The subjects' report of when the sound was "on" and "off" correlated perfectly with the unshielded and shielded conditions. 4. Subjects were placed in pairs in the RF beam. A screen shield was placed between the source and head of one member of each pair. The RF sound immediately ceased for the shielded member of the pair. The RF sound continued for the unshielded member. 5. Ear plugs rated to attenuate sound an average of 30 db were placed in the ears of subjects in the RF beam. The subjects reported a reduction in ambient noise level and an increase in the level of the RF sound, the latter probably being relative. 6. One of the deaf subjects had an average air conduction loss of 50 db. Bone conduction was fairly good; at worst he was down 25 db. His high-frequency response was relatively good. He could hear the RF sound with power densities approximating that needed for threshold perception in normals. 7. When a screen shield was placed so that it back RF energy which had passed the subject. the subject reported an increase in volume of the RF sound. 8. The subjects reported, when asked to localize the source of the RF sound, that the apparent source was a short distance behind the head. No matter how they were rotated in the RF field, they localized the source in the same place; behind the head. ' Frey concluded from his findings that it is difficult to accept that the perception of the RF !? sound is induced by acoustic energy external to the tympanic membrane. PULSED ENERGY SLEEP Although pulsed energy sleep utilizes frequencies far below the range used for radars, it is an effect produced on the human brain by pulsed electric energy of comparatively low power and should
2. With the transmitter antenna enclosed in a radome and not visible to the subject, the antenna was rotated at various rates. Thus, the RF beam swept by the subject several times a minute. The subjects invariably perceived when they were swept by the RF beam. 3. Subjects we re blindfolded and the beam was broken repeatedly in an irregular fashion by interposing a screen shield between the source and the subject. The subjects' report of when the sound was "on" and "off" correlated perfectly with the unshielded and shielded conditions. 4. Subjects were placed in pairs in the RF beam. A screen shield was placed between the source and head of one member of each pair. The RF sound immediately ceased for the shielded member of the pair. The RF sound continued for the unshielded member. 5. Ear plugs rated to attenuate sound an average of 30 db were placed in the ears of subjects in the RF beam. The subjects reported a reduction in ambient noise level and an increase in the level of the RF sound, the latter probably being relative. 6. One of the deaf subjects had an average air conduction loss of 50 db. Bone conduction was fairly good; at worst he was down 25 db. His high-frequency response was relatively good. He could hear the RF sound with power densities approximating that needed for threshold perception in normals. 7. When a screen shield was placed so that it back RF energy which had passed the subject. the subject reported an increase in volume of the RF sound. 8. The subjects reported, when asked to localize the source of the RF sound, that the apparent source was a short distance behind the head. No matter how they were rotated in the RF field, they localized the source in the same place; behind the head. ' Frey concluded from his findings that it is difficult to accept that the perception of the RF !? sound is induced by acoustic energy external to the tympanic membrane. PULSED ENERGY SLEEP Although pulsed energy sleep utilizes frequencies far below the range used for radars, it is an effect produced on the human brain by pulsed electric energy of comparatively low power and should
ad0273787_the_effects_of_radar_on_the_human_bodys02.docx