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gre” . Or Ble "2" ). Mr. Gebhardt - (Attn: Mr. Qa @ NBA © Rm 5714) uit. LABORATORY «0 ~ (Annex) 1 - Mr. . FEDERAL BUREAU OF INVESTIGATION 1 - wr. WASHINGTON, D. C.. 20535 SAC, Houston (67-9439) = ee et “@HEARNAP; UNSUB; THREAT TO ree - B13998-04, a | ” ¥ ACSASSINATE GOVERNMENT OFFICIALS, -“ HOUSTON, TEXAS, OKLAHOMA; AND MICHIGAN, 4/4/74 EM - SLA’ : HO Gpecimena tecalred 5/3/74 Gil483 Gno Sony C-69 carsette tape marked "4/4/74 -KTRH, HO, TEX." Results of Examination: | It was not possible to identify the voice of the unknown male on QI485 with male voices submitted previously in the Hearnap case. - Considerable low level background noise was noted in those portions of the G1485 tape containing the unknown male voice. The -- background noise Included a intermittent source consisting of toues at approximately $00, 540, 780 and 1160 hertz, plus additional tones covering wide bands of frequencies. The tones have duration of approximately .35 seconds spaced at .5 second intervals. ‘The specific source of these tones could not be identified. The Qi485 tape is being returned hes your office under separate cover via registered mail, > / sca ro 7 a ( “ ee _