sensor acoustic
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Diagnostic Network Patch System for SHM and Intelligent Infrastructure
White Paper As a device of interrogating guided acoustic waves in a structure, each of patches includes a sensor embodiment of flat optical cable loops and multilayered piezo ceramic disk as... [04 Aug 2008]
A Full Bandwidth Calibrator for a Sound Pressure and Particle Velocity Sensor
White Paper This is done by calculating the acoustic impedance at a certain distance of a spherical loudspeaker. In literature it is shown that it is possible to calibrate a sound pressure and a particle velocity... [08 Jul 2008]
Photos: Talons, Eagles and Enforcers - the tech behind war
Photo Holographic quantum technology and acoustic sniper sensors may sound like the stuff of science fiction films - but they are actually new defence technologies destined for the battlefield. Combined with a high-resolution... [26 Mar 2008]
Monitoring Volcanic Eruptions With a Wireless Sensor Network
White Paper This paper describes the experiences using a wireless sensor network to monitor volcanic eruptions with low-frequency acoustic sensors. The network collected infrasonic (low-frequency... [05 Mar 2008]
An Energy-Efficient MAC Protocol for Underwater Wireless Acoustic Networks
White Paper This paper proposes a distributed, scalable, energy-efficient MAC protocol that works despite long, unknown propagation delays of the underwater acoustic medium. This protocol can be used for delay-tolerant applications... [31 Aug 2007]
MAC Layer Support for Group Communication in Wireless Sensor Networks
White Paper It presents case studies of two example applications, acoustic target tracking and propagation of information with feedback using LGC-MAC and demonstrates that LGC-MAC can improve the response time, alleviate channel... [01 Aug 2007]
On-demand Linux for Power-Aware Embedded Sensors
White Paper An acoustic beamforming application demonstrates a 4X power improvement over a centralized architecture. The authors introduce a distributed sensor architecture which enables high-performance 32-bit... [01 Apr 2007]
Miniature 6-DOF Inertial System for Tracking HMDs
White Paper Commercially available magnetic, optical, acoustic, and mechanical head-trackers suffer from various problems such as vulnerability to interference, line-of-sight restrictions, jitter, latency, small range, and high cost. [25 Feb 2004]
