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Crowdsourcing Intelligence to Combat Terrorism: Harnessing Bottom-Up Collection to Prevent Lone-Wolf Terror Attacks
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In: DTIC (2015)
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| 42 |
Auditory Perception in an Open Space: Detection and Recognition
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In: DTIC (2015)
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Abstract:
The purpose of the current study was to investigate the effects of distance and meteorological conditions on detection and recognition of, and distance estimation to, various sound sources spread across a large open field. This report presents results of the detection and recognition tasks. Both acoustic (target sound and noise level) and meteorological (wind direction and strength, temperature, atmospheric pressure, humidity) data were collected for each experimental trial. Twenty-four subjects participated in this study. Eight various sounds delivered from 6 test loudspeakers were presented to the listeners. The results indicate that in most cases as soon as a sound is detected, it is recognized. In most cases both the detection and recognition of sound sources declined rapidly at distances greater than approximately 100-200 m. The main effects of weather conditions and environmental noise are strongly correlated. Some expectations of sound propagation were not observed during data collection; specifically, sounds were more easily heard in the afternoon as opposed to the morning, which meant that participants detected and recognized sounds more accurately in the afternoon than in the morning. This was most likely attributed to the varying effects of temperature, humidity, and background noise in relatively very hot listening conditions. However, the overall performance of participants was very close to the results predicted by in-house software that modeled human detection of sounds. ; Prepared in collaboration with Evidence Based Research, Inc. The original document contains color images.
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Keyword:
*ACOUSTIC DETECTION; *AUDITORY PERCEPTION; *HEARING; *METEOROLOGICAL DATA; *NOISE(SOUND); Acoustics; Anatomy and Physiology; Atmospheric Physics; ATMOSPHERIC SOUNDING; AUDITORY DISTANCE ESTIMATION; BACKGROUND NOISE; BAROMETRIC PRESSURE; COMPUTER PROGRAMS; CORRELATION; DATA ACQUISITION; EXPERIMENTAL DESIGN; HIGH TEMPERATURE; Human Factors Engineering & Man Machine System; OPEN SPACE; RANGE(DISTANCE); RECOGNITION; SOFTWARE TOOLS; SOUND PROPAGATION; SOUND TRANSMISSION; STRENGTH(GENERAL); TEMPERATURE; WAVE PROPAGATION; WIND DIRECTION
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URL: http://www.dtic.mil/docs/citations/ADA621862
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA621862
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| 43 |
Learning to Understand Natural Language with Less Human Effort
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In: DTIC (2015)
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| 44 |
Automated Essay Scoring: A Literature Review
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In: Working Papers in Applied Linguistics and TESOL, Vol 11, Iss 2, Pp 40-64 (2015) (2015)
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| 45 |
Seeking student voices in collaborative spaces : a case study of basic writers interacting in Blackboard, Facebook and the classroom
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| 46 |
Instrumentation of annotated c programs for test generation
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In: 2014 IEEE 14th International Working Conference on Source Code Analysis and Manipulation ; https://hal-cea.archives-ouvertes.fr/cea-01836306 ; 2014 IEEE 14th International Working Conference on Source Code Analysis and Manipulation, Sep 2014, Victoria, Canada. pp.105-114, ⟨10.1109/SCAM.2014.19⟩ (2014)
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| 47 |
Guiding learners to near native fluency in English through an adaptive programme of activities which includes phoneme and prosody analysis.
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| 48 |
BACIBeans: A NetBeans Plugin for Concurrent Programs
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In: Seaver College Research And Scholarly Achievement Symposium (2014)
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| 49 |
Intelligence Virtual Analyst Capability: Governing Concepts and Science and Technology Roadmap
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| 51 |
Graph Analyzer Widget Closer to Agility through Sense-Making
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In: DTIC (2014)
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| 52 |
Towards A Robust Arabic Speech Recognition System Based On Reservoir Computing
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| 53 |
Finger placement correction for static gesture recognition in American Sign Language
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| 54 |
The creation and utilization of a physical science tablet application in the primary classroom
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| 55 |
СОВРЕМЕННЫЕ МЕТОДЫ ОТБОРА ЯЗЫКОВОГО МАТЕРИАЛА ДЛЯ ОБУЧЕНИЯ ПРОФЕССИОНАЛЬНО-ОРИЕНТИРОВАННОМУ ОБЩЕНИЮ НА ИНОСТРАННЫХ ЯЗЫКАХ
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| 56 |
Forcing MSO on Infinite Words in Weak MSO
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In: 28th Annual ACM/IEEE Symposium on Logic in Computer Science ; https://hal.archives-ouvertes.fr/hal-00776921 ; 28th Annual ACM/IEEE Symposium on Logic in Computer Science, Jun 2013, New Orleans, United States. pp.448-457, ⟨10.1109/LICS.2013.51⟩ (2013)
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| 57 |
Denotational Semantics of A User-Oriented, Domain-Specific Language
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In: ISSN: 2075-2180 ; Electronic Proceedings in Theoretical Computer Science ; https://hal.inria.fr/hal-00865381 ; Electronic Proceedings in Theoretical Computer Science, EPTCS, 2013, 129, pp.229-249. ⟨10.4204/EPTCS.129.14⟩ (2013)
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| 58 |
The dimensions and complexities of audio-visual association.
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| 59 |
Evolution Feature Oriented Model Driven Product Line Engineering Approach for Synergistic and Dynamic Service Evolution in Clouds:Four Kinds of Schema
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| 60 |
Evolution Feature Oriented Model Driven Product Line Engineering Approach for Synergistic and Dynamic Service Evolution in Clouds
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