Massachusetts Institute of Technology

David Francis Aubin, Jr

Joseph John Lacirignola

David Christopher Maurer

Trina Rae Vian

Christopher J Smalt

Paula P Collins

Thomas Francis Quatieri, Jr

Nicolas Malyska

Paul D Gatewood

Christine Michelle Weston

Kate D Fischl

Andrew Peter Dumas

Ninoshka Krishan Singh

Edward H Chen

Kerry Alexander Johnson

Jeffrey Shane Palmer

Paul T Calamia

Erik Metzger

Mary Katherine Byrd

Shakti Davis

Olha Townsend

Described are systems, methods, and computer readable medium for dynamic power usage and data transfer rate management in a sensor network including synchronous and asynchronous links. Exemplary embodiments provide a lightweight communication protocol enabling dynamic management of data buffer size in a sensor network and corresponding control of power usage and data transfer rates in the sensor network.

System and methods for dynamic power usage and data transfer rate management in a sensor network

Systems, apparatus, and methods for collecting, interpreting, and utilizing noise exposure data may include sensors to obtain an analog signal representative of impulse noise sound pressure and an analog signal representative of continuous noise sound pressure. At least one ADC may generate digital signals by sampling the analog signals at rates equal to or greater than twice the reciprocal of a minimum impulse noise rise time. Accelerometers may obtain data in close proximity to and remote from the sensors. At least one processor may include a first combining node to combine the digital signals to represent both the continuous noise and the impulse noise, a shock-artifact detection filter to identify a time frame including a shock artifact based on the accelerometry data, a frequency filter to generate a background-removed audio signal, an adaptive filter to estimate the shock artifact, and a second combining node to produce a shock-artifact-free audio signal.

High fidelity systems, apparatus, and methods for collecting noise exposure data

A directional force sensor and sensing system are described. The directional force sensor includes a leaf spring and one or more load sensors disposed about the leaf spring such that in response to a force applied to the leaf spring, the one or more load sensors provide a signal. A controller is coupled to receive signals from the one or more directional force sensors and determines characteristics of forces applied to the directional force sensors.

Directional force sensing element and system

Loud sounds with fast rise times, like gunfire and explosions, can cause noise-induced hearing loss (NIHL). Unfortunately, current models do not adequately explain how impulsive sounds cause NIHL, which makes it difficult to predict and prevent NIHL on battlefields and other hostile or rugged environments. Fortunately, the impulsive sounds experienced by soldiers and others working in rugged environments can be recorded using a compact, portable system that acquires, digitizes, and stores high-bandwidth audio data. An example of this system can be mounted on a helmet or other article and used to record hours of audio data at a bandwidth of 20 kHz or higher, which is broad enough to capture sounds with rise times less than 50 ms. An analog-to-digital converter (ADC) digitizes these broadband audio signals at rate of 40 kHz or higher to preserve the impulse information. A processor transfers the digitized samples from a buffer to a memory card for later retrieval using an interrupt-driven processing technique.

Methods and apparatus for recording impulsive sounds

Growing community of inventors

Pelham, NH, United States of America

David Francis Aubin, Jr