MICROPHONE STUDIES ACOUSTIC ARTILLERY BY NIKOLAI ISKOVIEVICK GOLORIN LIBRARY OF CONGRESS - CALL NO. UF 848 G6

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03300A001100060003-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: May 4, 2011
• Sequence Number: 3
• Publication Date: November 18, 1952
• Content Type: MEMO

Sanitized Copy Approved for Release 2011/05/04 :CIA-RDP78-03300A001100060003-9
i8 November 1952
I~iEMOR.ANDUht .1?'OR Rl~CO$D
T4 s A. C, T68/ASD
SUnJ~CT ~dicrvphoae Stadler
Acoustic Artily by Nilwlai Iakovlrvick Goloria
_~ Y~~oaSress ? call No. U]!` 848 G~
i. A review of chapter tine of the referenced ttussian text revealed that
it was divid,d into the tollowia8 sectiaars
Section 1 General ;information about trticrophones
Section ~ Contact t"iicrophones (i. e. Carbon Type
Section 3 Condenser idicsophoaes
Section 4 I~loctran~aSaetic h+ticrophoaes
Section 5 tClectrodic Microphones
Section b Capillary Microphones
Section ? MaSaetostrlction
Section 8 Plena Microphones
Section 4 Thermonic Microphones
Section IO Car Microphones
8ectlon i I Not ~"ir? Micraphoaes
Section I t Photo Microphones
The discussions ret forth in each case r
overt iatormatioa oa each of the sub3ectr with the resented well_~o~ and
pertaining to capillary mi crophoaes. Possible exception of that
2. The capillary micropT~no it reported to consist of a vessel container
Mercury into which a tunnel with a capillary throat is inserted so that its 8
throat is below the upper level of the nzercur
fined in the vessel of mercer Y? When the funnel is Initially
lower Y, the level of the mercury in the capillary is
than that in the outer ructions of the container.
the capillary prevents the mercury ~ the tuanol from rapidly ruin i aced asause
in` the same level as the ext~t-oM 1 8 sum
mercury bath. An electrolyte is thiq~~ A lead ariro is Positioasd in the outer
poured over the mercujy in the tunnel
25X1
Sanitized Copy Approved for Release 2011/05/04 :CIA-RDP78-03300A001100060003-9
 Sanitized Copy Approved for Release 2011/05/04 :CIA-RDP78-03300A001100060003-9
and a second lead wir? is inserted into the, electrolyte. Acoustical waves
incident on the surface of the electrolyte cause the liquid interface berg,
LAe electrolyte and the mercury to move, thus producing and cltan~ia~ the
ratio ctt the internal to external resistances of the mercury in and out of the
funnel capillary. ~Aacordia~ly, if an eleretrical circuit includiad an amplifier
is w~z:plsad to the above mentioned leads the acoustical variations producing
the moverrxeat of the liquid interface cant be reproduced.
3. The effectiveness of this microphone was not discussed. but possible
operational applications utay at sometime lend themselves to it? use or
modifications of it,
8 AiD/ICA
Sanitized Copy Approved for Release 2011/05/04 :CIA-RDP78-03300A001100060003-9