The goal of this project is to develop and demonstrate a data fusion system for all active and passive submarine acoustic sensors. The system will perform association of all data associated with a common contact. Associated data will be used to provide improved track estimates and classification… More

This Phase I project will investigate the feasibility of a submarine passive localization system which will localize and track short duration intentional and unintentional emissions from submarines and weapons. The approach combines radius of curvature ranging using time delay measurements from… More

This SBIR project will determine the feasilibility of acoustic interference rejection techniques for a submarine acoustic intercept system. The signal processing techniques developed will permit the continuous tracking of active weapon sonars in the presence of interference from countermeasures and… More

"Under Phase I array-processing techniques were developed andanalyzed which provided an effective interference rejectioncapability for acoustic intercept systems. This was demonstratedvia computer analysis and simulation of these techniques asapplied to a volumetric acoustic intercept sensor. It… More

"Under Phase I array-processing techniques were developed andanalyzed which provided an effective interference rejectioncapability for acoustic intercept systems. This was demonstratedvia computer analysis and simulation of these techniques asapplied to a volumetric acoustic intercept sensor. It… More

"Bird strikes and ingestion of birds into engines pose serious threats to aircraft during takeoff and landing operations at many air bases. AAC and Cornell propose to mitigate these threats by developing an acoustic bird monitoring system that provides bothreal-time snapshots and historical… More

Advanced Acoustic Concepts, Inc. (AAC) proposes to implement a computational model of human auditory processing based upon cortical theory and to demonstrate its utility to evaluate and improve systems for speech communication and automated recognition ofspectro-temporal patterns. Specifically, AAC… More

In order to win the war for recruitment and retention, the CNO has stated that sailors of today and tomorrow must be well trained and equipped. Given the diverse needs of training communities, acquisition managers, and curriculum developers it isultimately important to provide accountability and… More

Bird-aircraft collisions (birdstrikes) present a significant threat to military and commercial aircraft, and as bird populations and air traffic continue to grow, and airport/airbase operations continue to expand, the problem will steadily get worse. A majority of the efforts to solve this problem… More

Recent sea tests with a Variable Depth Source (VDS) (e.g. IUSW-21, LBVDS) have demonstrated increased submarine detection capabilities with a broadband active source that provide continuous active acoustic coverage below the layer and along the entire water column. The primary disadvantage of a VDS… More

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Advanced Acoustic Concepts, Inc. (AAC) proposes to extend its Phase I work in Auditory Cortex based sound classification. During Phase I AAC demonstrated the feasibility and accuracy of a computational model of human auditory processing based upon this cortical theory. AAC also demonstrated the… More

In order to win the war for recruitment and retention, the CNO has stated that sailors of today and tomorrow must be well trained and equipped. Given the diverse needs of training communities, acquisition managers, and curriculum developers it is ultimately important to provide accountability and… More

Protection of U.S. coastlines must begin with a front line situated significantly far enough seaward that potential threats to the Homeland can be detected and tracked, allowing enough time to interrogate and intercept if the threat is verified. The team of ACC and Sparton Electronics proposes a… More

Protection of the Homeland must include the monitoring of our airspace, borders, and most importantly, shorelines. Securing our waterside assets is a difficult task that must utilize a multi-sensor surveillance system that requires a reliable underwater threat detection sensor. AAC produces for the… More

Terrorists can employ small water craft, boats, submersibles and swimmers to detonate explosives along side ships, or attach devices to the hull above or below the waterline. Ship defense against "asymmetrical threat" targets such as multiple small boats in the complex littoral environment are made… More

The Army's Future Combat System will rely on a data communications backbone based on the tactical mobile ad-hoc communications network (TMACN). The unique nature of TMACNs - their mobility, adaptability, and potentially substantial sizes - makes performance prediction a difficult task, and one that… More

Protection of ground troops and physical assets against hostile attacks on the battlefield is a crucial capability that must be provided by a combination of sensors and automated signal processing software that can function at all times, including in low-light/no-light and non-line-of-sight… More

High-frequency acoustic modems are required to provide undersea communication networks to support covert surveillance operations. These modems can also be used as platforms for compact, low power surveillance sensors and processing. A natural first step would be to integrate a capability for passive… More

A layered approach to Maritime Domain Awareness begins with surveillance of vessel traffic as far offshore as possible to allow the advantage of time and space to identify and intercept threats before they can get close enough to affect the Homeland. The team of Advanced Acoustic Concepts (AAC) and… More

This proposal addresses the application of new acoustic processing technologies to automatically identify and eliminate non-language speech sounds as a pre-processing stage to improve audio processing. Non-language speech sounds make up a large part of natural human language use, but contemporary… More

Advanced Acoustic Concepts (AAC) will develop a reliable, validated, and fully documented system for digitally recording ambient soundscapes and resynthesize the desired soundscape for binaural presentation to human listeners via headphones. The system will take advantage of the established… More

Unmanned Surface Vehicles (USVs) deployed beyond the direct observation of the host Littoral Combat Ship are susceptible to significant threats due to vandalism, piracy, and/or fouling from fishing gear. Advanced Acoustic Concepts (AAC) and Accurate Automation Corporation propose a multi-sensor… More

Large military installations and training complexes are difficult to secure because they consist of largely remote and/or unoccupied areas that are open to trespassers and contain numerous sites of localized high-value assets that are vulnerable to vandalism. An acoustic surveillance system that can… More

This proposal addresses the application of new acoustic processing technologies to automatically identify and eliminate non-language speech sounds as a pre-processing stage to improve audio processing. Non-language speech sounds (coughing, breathing, 'ah,' 'uhmm') make up a large part of natural… More

The current generation of high-frequency active 3-D acoustic imaging systems presents a challenge to the covert use of Underwater Vehicles (UVs) by Special Forces teams. An acoustic intercept capability is needed to detect active signals before the UV is detected, so that it can vector away from the… More

Advanced Acoustic Concepts (AAC) will develop a spread spectrum waveform for use with the Continuous Active Sonar (CAS). CAS uses the AN/SQS-53C as the sonar source operating at 100% duty-cycle. It then uses a Multi-Function Towed Array (MFTA) as the receiver. This is an ideal application for a… More

As the use of commercially available diver detection systems becomes more widespread, Navy divers will face a greater risk of being detected while conducting clandestine operations. If a diver is conducting an operation in enemy waters where an active diver detection system is employed, the entire… More

Advanced Acoustic Concepts (AAC) will develop a spread spectrum waveform for use with the existing receive-only sonobuoys. Ideally the sonar source will be constructed to operate at 100% duty-cycle. This is an ideal application for a spread spectrum waveform as the largest reduction in transmit… More