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TELETYPE TO SAN FRANCISCO _.: RE: HEARNAP " oo - _ Se |e "LOW FREQUENCY CONTINUOUS F RUMBLE AUDIBLE IN | BACKGROUND Is | °< oF TYPE OFTEN DUE TO MACHINERY AND AIR MOVEMENT ASSOCIATED : -WITH HEATING AND/OR AIR CONDITIONING SYSTEMS, | - aa THERE IS NO INDICATION THAT RECORDER OR MICROPHONE WAS "WURNED OFF AT END OF VOICE MESSAGES. BACKGROUND RUMBLE AND OTHER VERY FAINT NOISES CONTINUE FOR ® APPROXIMATELY SIX MINUTES " UNTIL END OF TAPE, : EXAMINATIONS CON TINUING, ADDITIONAL RESULTS WILL FOLLOW. iag ae a id eee Ae me ee ee or