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Approved For Release 200 470 -RDP96-00788R001300020001-6 PP ONCLASS IF TED ST-CS—01-169~-72 July 1972 3. (U) Very little information is available on animal reactions to infrasound at this time. According to Maire, it has been reported that a frequency of 7 Hz caused "epileptic fits" and the subsequent death of rats at some distance from the laboratory in which the generator was located. There is a newspaper article claiming that during experiments with a frequency of 7 Hz, all dogs in a nearby apartment building "went completely insane with fear" (262). SECTION III ~ SONIC NOISE 1. (U) There have been several pertinent Soviet reports on the psychological effects of noise in the 20 to 20,000 Hz range. Among these was a report by Korotkin et al (263) that showed changes in auditory thresholds as a result of suggestion during hypnosis. In 14 of 16 subjects, the deterioration or imp rovement in audibility of sound signals suggested during hypnosis produced a significant change in auditory sensitivity in accordance with the suggestion of the hypnotist. More substantial changes in auditory sensitivity (up to 60 db) followed the suggestion of poor audibility. The range of changes in sensitivity following the suggestion of good audibility was narrower (up to 21.4 db). The lowering of the auditory thresholds in response to a suggestion of good audibility was largely dependent on their level on the day of the experiment. The higher the original levels, the more they dropped as a result of Suggestion. The considerable individual variations in auditory sensitivity caused by suggestion were obviously related to the degree of suggestibility of the subjects. 2. (U) Rudenko reports that canine death can be caused by strong acoustic stimulation (264). Prolonged attempts (for six weeks) to evoke neurosis in a dog possessing exceptional strength and equilibrance of nervous processes by using super-strong acoustic stimuli failed to produce any appreciable disturbances of its nervous activity. Then to increase the excitability of the dog's nervous system and raise its working capacity to the limit, a loud tone (120 decibels) was combined with the administration of caffeine in 0.5, 1.0, and 1.5 grams doses 30 minutes before the experiment. Ten minutes after a 1.5 gram dose of caffeine was administered, there was a drastic tonic convulsion of the entire body and a few seconds later the animal died. This indicates that this type of animal has strongly pronounced protective mecha- nisms and that destruction of these mechanism may lead to a break- down of higher nervous activity or to even graver consequences. 93 UNCLASSIFIED Approved For Release 2003/09/10 : CIA-RDP96-00788R001300020001-6