Background noise that interferes with cellphone conversations could be a thing of the past thanks to a dual microphone system developed at the University of Toronto.
“In typical environments there is background noise and reverberations that make it hard to carry on a cellphone conversation,” says lead researcher Professor Parham Aarabi of U of T’s Edward S. Rogers Sr. Department of Electrical and Computer Engineering. “This system employs two microphones that, just like the two human ears, focus on the speaker’s voice and filter out other noises.”
The system uses time-frequency filters to determine the speaker of interest’s location based on the length of time it takes for the most intense sound to arrive at the microphones. As the two microphones observe the speaker’s voice, a computer chip continuously decides which frequencies belong to the speaker and which ones to the extraneous noise. The interference is then “damaged” and the volume is scaled back.
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For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
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At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
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