This technology relates to sound absorption material. Reduction of noise in the environment is important for avoiding hearing loss and for improving psychological health in humans. This technology provides sound absorbing composition that includes particles embedded in a network of nanofibers. The composition contains pores ranging in size from less than 10 nm to more than one micron in diameter and exhibits acoustic transmission loss ranging from 20 to 60 dBcm thickness of the composition.
This technology relates to the decorrelation of audio signals for use in surround sound techniques. Decorrelation improves listener envelopment and spatial immersion, but prior techniques suffer from unwanted timbre coloration and are computationally expensive. The present technology improves decorrelation by utilizing a pseudorandom sequence and a reciprocal of the pseudorandom sequence to convolve the audio signal into the desired number of output signals.
Coastal urban development has resulted in buildings and civil structures extending to the waters edge, which has significantly reduced the coastlines natural mechanisms for resisting erosion from wave action. There is a need to restore the ability of many coastlines to absorb wave energy and to restore native shoreline plants. To address this problem, this technology provides biomechanical structures for coastline remediation.
Rensselaer researchers have developed a water treatment system that is integrated with the faade of a building. The system includes a lens that forms part of the building faade and that guides sunlight through wastewater carrying conduits so that the wastewater is treated by the sunlight. The system therefore provides an inexpesive water treatment solution, but also increased thermal storage, as the water absorbs heat energy from the sunlight as well.
This technology relates to solid-state devices as replacements for incandescent light bulbs. The LED based bulb uses the normal Edison socket, but the LED and heat sink are placed on the far end of the bulb. The heat sink attaches to the bottom and outside of the bulb providing a structural base for the LED. Several alternative shapes for the light guide are provided to optimize the light emitted both in quality and quantity (i.e., more closely matching that of white incandescent bulbs).