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"Multi-channel electronic stethoscope for enhanced cardiac auscultation" by Shahab Pasha, Jan Lundgren et al.

Abstract
This paper reports on the implementation of a multi-channel electronic stethoscope designed to isolate the heart sound from the interfering sounds of the lungs and blood vessels. The multi-channel stethoscope comprises four piezo contact microphones arranged in rectangular and linear arrays. Beamforming and channel equalisation techniques are applied to the multi-channel recordings made in the aortic, pulmonary, tricuspid, and mitral valve areas. The proposed channel equaliser cancels out the distorting effect of the chest and rib cage on the heart sound frequency spectrum. It is shown that the applied beamforming methods effectively suppress the interfering lung noise and improve the signal to interference and noise ratio by 16 dB. The results confirm the superior performance of the implemented multi-channel stethoscope compared with commercially available single-channel electronic stethoscopes. ....

Hannel Equalisation , Hest Acoustics , Icrophone Arrays , Ulti Channel Electronic Stethoscope ,

Samsung and Spark light up 5G net in New Zealand

Samsung and Spark light up 5G net in New Zealand
Samsung switches on its first 5G in New Zealand, claiming to bring a new wave of rich and immersive services to users of the Spark network
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Published: 10 Mar 2021 12:40
Spark New Zealand and Samsung Electronics have announced the launch of a 5G network in Christchurch, the most populous city in New Zealand’s South Island.
The launch is the latest part of Spark’s national 5G roll-out, which began in September 2019. The operator has now switched on 5G in central Christchurch just in time for fans to watch the America’s Cup action live at the official FanZone in the city from 10-21 March. Located in the city centre, the FanZone will have free 5G Wi-Fi available for the duration of the yachting race. ....

South Island , New Zealand General , New Zealand , United States , New Zealanders , Bharti Airtel , Rajesh Singh , Renee Mateparae , Minsu Chu , Spark Technology , Samsung Electronics New Zealand , Red Hat , Emirates Team New Zealand , Samsung Electronics , Spark New Zealand , Spark New , Samsung Electronics New , Christ Church , America Rsquos Cup , தெற்கு தீவு , புதியது ஜீலாந்து ஜநரல் , புதியது ஜீலாந்து , ஒன்றுபட்டது மாநிலங்களில் , பாரதி ஏர்டெல் , ராஜேஷ் சிங் , மின்சு சூ ,