. Basic methods for the calibration of sonar equipment. 162 ASSOCIATED EQUIPMENT: DOMES AND BAFFLES 30 m 20 10 1 1 \ 1 1 1 1 1 ^= 1 1 1 . 1 1 ^'^ 1 I ^=i-S 1 1 1 / â ^=- \ ) I 1 \ // - 1 /I ' \ / \\ 1 1 \ ll \ \ / \\ ll 1 y 1 ' \ v^ h 1 1 \ / 1 1 \\ 1 \\ \ 1 1 \\ / \\ ' \\ 1 \\ 1 /; 1 / \\ 1 \\ / \ \ 11 1 / / \\ // \\ / v\ 1 y \\ // \\ ^ \\ i '\ ^"^R- \ , // \ I AIR-FILLED BAFFLE- 1 1 \ / 1 { "^ FILLED BAFFLEâ*^ \ 7 \ 1 1 ^^ // \\ ^ ^ ' A STEEL BAFFLE-*i^ 1 1 r^' ^ [ STEEL BAFFLE 1 â¢^^ ~^y s \ \ '^ ^ '^ 4 6 8 10 2 4 TRANSDUCER BAFFLE SEPARATION IN WAVE LENGTHS 015. Decrea
. Basic methods for the calibration of sonar equipment. 162 ASSOCIATED EQUIPMENT: DOMES AND BAFFLES 30 m 20 10 1 1 \ 1 1 1 1 1 ^= 1 1 1 . 1 1 ^'^ 1 I ^=i-S 1 1 1 / â ^=- \ ) I 1 \ // - 1 /I ' \ / \\ 1 1 \ ll \ \ / \\ ll 1 y 1 ' \ v^ h 1 1 \ / 1 1 \\ 1 \\ \ 1 1 \\ / \\ ' \\ 1 \\ 1 /; 1 / \\ 1 \\ / \ \ 11 1 / / \\ // \\ / v\ 1 y \\ // \\ ^ \\ i '\ ^"^R- \ , // \ I AIR-FILLED BAFFLE- 1 1 \ / 1 { "^ FILLED BAFFLEâ*^ \ 7 \ 1 1 ^^ // \\ ^ ^ ' A STEEL BAFFLE-*i^ 1 1 r^' ^ [ STEEL BAFFLE 1 â¢^^ ~^y s \ \ '^ ^ '^ 4 6 8 10 2 4 TRANSDUCER BAFFLE SEPARATION IN WAVE LENGTHS 015. Decrease in rear transducer response chic to baffle. 10 no longer strictly applicable, and general considera- \akic of (i-b and not too sensitively dependent on x tions indicate that no shielding exists even for \ ^ A. as long as the latter is less than the smaller of the two On the other hand, Figure (i indicates that for rt-i> » A critical lengths given abo\e. However, with air-filled the shielding is inore or less independent of the exact baffles the shielding is greatest for small 10 2 4 6 8 10 2 TRANSDUCER BAFFLE SEPARATION IN WAVE LENGTHS Figure 6C. Decrease in rear liansducer response due to Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Office of Scientific Research and Development. National Defense Research Committee. Washington, D. C.
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