| Integrating Analysis and Design. |
MAY 1989 |
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| Authors:
C. Emson; C. W. Trowbridge; E. M. Freeman; P. Girdinio; G. Molinari
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 | In recent years, the major emphasis on CIM research and development activity has been in the area of automatic manufacturing, where technical and economical feasibility is certainly critical for a viable CIM environment. However, in order to achieve a truly integrated manufacturing environment, it is necessary to integrate design activities into the structure. Although computers have been used for many years in the design process the present situation is not ... |
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| Land Mine Detection System. |
23 FEB 1973 |
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| Authors:
Allen M. Morita; TRW SYSTEMS GROUP REDONDO BEACH CA
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| The objective of this contract was to determine the feasibility of using acoustic waves for the detection of metallic and nonmetallic land mines. It was found that a 3 KHz pulse burst could detect all of the simulated mines at burial depths exceeding 12 inches. The mine reflected signals exhibited a signature significantly different from those obtained with no mine present and with small soil inhomogeneities present. Rock reflected signals ... |
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| Acoustic Detection and Tracking using Correlation Techniques. |
NOV 1972 |
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| Authors:
James G. Constantine; Mark D. Dickinson; ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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| The purpose of this work was to assess experimentally the feasibility of locating ground vehicles by time correlating vehicle sounds relayed by two or more separated 'sensors'. Acoustics were selected because useful ranges of one to two kilometers are possible, as far as ground sources are concerned, and because acoustic signatures, although very complex and difficult to deal with, contain a wealth of information which if properly treated by using ... |
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| Evaluation of Atmospheric Correlation Techniques. |
AUG 1972 |
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| Authors:
John E. Maloney; Richard L. Sebastian; Kathleen F. Mathieu; ENSCO INC SPRINGFIELD VA
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| This report describes the successful application of methods for extracting propagation time and Doppler information from radiated acoustic signals. The application of these methods was undertaken to investigate the feasibility of passively tracking vehicles by using their radiated noise. This work shows that both signal prewhitening and Doppler compensation are important to the successful use of signal cross-correlations in tracking moving vehicle targets. Prewhitening is necessary because prominent spectral lines ... |
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| ACOUSTIC TELESCOPE. |
09 AUG 1967 |
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| Authors:
Edward X. M. Jones; ARMY CONCEPT TEAM IN VIETNAM APO SAN FRANCISCO 96384
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| Acoustic telescopes were evaluated in Vietnam to determine if they were effective in improving the capability of the unaided ear to detect and recognize audio signals. The telescopes offered very little improvement over the capability of the unaided human ear. Also, they could not withstand the rugged environmental conditions in the Republic of Vietnam. It was recommended that acoustic telescopes not be procured for use in Vietnam. (Author) |
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| STATIC ELECTRIC FIELDS ON SINUSOIDAL SURFACES. |
01 JUN 1966 |
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| Authors:
D. J. Angelakos ; H. S. Lu ; D. L. Johnstone; CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB
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| The purpose of this study was to evaluate the possibility of detecting sound waves on the surface of the sea by their effect on the charge distribution of the ambient d-c electric field. It is assumed that sound waves produce small sinusoidal variations in height on the surface of water. These surface waves have a wavelength determined by the frequency of the sound wave and its velocity on the surface ... |
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| SENSORY INTERACTION: THE EFFECTS OF AMBIENT NOISE AND COMBINED VISUAL-AUDITORY SONAR DISPLAYS ON SIGNAL DETECTION. |
04 MAY 1966 |
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| Authors:
Angelo Mirabella; GENERAL DYNAMICS GROTON CT ELECTRIC BOAT DIV
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| A review of the literature was undertaken to determine the effects of ambient noise and combined audio-visual sonar displays on signal detection. Literature relevant to the problem of ambient noise showed: (1) that an increase in ambient noise should have no effect on the ability of the alerted operator to detect signals; (2) that for vigils requiring responses to infrequent signals in single displays, noise has little or no effect ... |
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| GRAPHITE STRAIN TRANSDUCER. |
APR 1965 |
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| Authors:
Thomas A. Cederlund; TRANS-SONICS INC BURLINGTON MASS
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| This study was conducted to determine the applicability of using a graphite monoparticulate layer transducer as a means of detecting sound vibrations in diaphragms. Interest for this study was provided by reported gauge factor values of several thousand in strain gauges using this graphite monolayer technique. Techniques were developed for the formation and deposition of monoparticulate graphite layers and their transfer to thin film substrates. Evaluation of deposited graphite layers ... |
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