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.
This technology relates to a water or soda bottle or vessel that is designed to allow for the bottle to interconnect with other bottles of similar design and standard dimensions to form useful second use products. A recess in the lower surface of the bottle receives the neck of another storage bottle. There are recesses perpendicular to the vertical axis of the bottle capable of receiving the mating side recess of another storage bottle. There are two such recesses on each storage bottle, one on each side of the bottle, parallel to each other.
This invention is directed to a hybrid asynchronous, distributed audiovideo group conferencing system.The invention eliminates the need to choose between the convenience of asynchronous messaging (such as email) and the interactive capabilities of full bandwidth conferences by providing sound and video in a recorded storage and retrieval system, indexed to facilitate examination and comprehension by distributed group members.Melding the beneficial attributes of asynchronous conferencing systems and full-channel audiovideo communication provides advantages greater than either set alone.