. Basic methods for the calibration of sonar equipment. AIR BAFFLE PLANE WAVE INCIDENT SOUND. e Equation (6) reduces to equation (4) if 27r('/\j « 1 and pjCj/pjjf(j » 1. conditions always satisfied by the thickness and material of dome walls in current use. INTENSITY OF SHADING REPRESENTS SOUND SHADOW (ie HEAVY SHADING CORRESPONDS TO LOW SOUND PRESSURE ) Figure 3. Sound pressure distribution behind 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 perfect
. Basic methods for the calibration of sonar equipment. AIR BAFFLE PLANE WAVE INCIDENT SOUND. e Equation (6) reduces to equation (4) if 27r('/\j « 1 and pjCj/pjjf(j » 1. conditions always satisfied by the thickness and material of dome walls in current use. INTENSITY OF SHADING REPRESENTS SOUND SHADOW (ie HEAVY SHADING CORRESPONDS TO LOW SOUND PRESSURE ) Figure 3. Sound pressure distribution behind 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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