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If the Rx level is under -25 dBm, the Signal-to-Noise Ratio (SNR) is likely to decrease, meaning that the speed also decreases.->Tone: This means do not transmit a Tone or DTCS Code, but use the ToneSql value for receive squelch->DTCS: This means do not transmit a Tone or DTCS Code, but use the DTCS Rx Code value for receive squelch DTCS->: This means use the DTCS Code value for transmit When you breathe, speak, laugh, cough, sneeze or sing you produce droplets, small and bigger ones. Ideally, the Rx level should be in the range of -18 to -25 dBm. The server modems normally transmit at -13 dBm by default. Merging the two non-contact transmission modes, large-droplet and aerosol, into a unique non-contact airborne transmission mode, is essential to break the chain of infection, according to a new JRC study.The Rx level is the power in dBm of the received signal.
The current measure of standing one or two meters away from other people would not be enough in case of airborne transmission the spatial separation between two persons indoors. Both types of face coverings provide inward and outward protection of varying degree depending on numerous factors including the size of the emitted respiratory droplet, the material they are made of, and how well they fit a person’s face. The proposed unified mode of aerosol transmission implies that the traditional distinction of face coverings into those that provide source control (e.g., surgical masks that protect others from droplets emitted by the wearer, outward protection) and susceptible control (e.g., N95 respirators that protect the wearer, inward protection) should be reconsidered. the type of masks that we should wear indoors.
The emergence of SARS-CoV-2 and the role of aerosols in the transmission of the virus brought JRC previous and current work in the centre of the debate.In the face of newly emerging respiratory infections, understanding how the virus spreads is key for breaking the chain of infection.JRC scientists urge for closer collaboration between aerosol scientists, epidemiologists, experimentalists and clinicians to resolve several open questions about virus-transmission pathways. In indoor ventilated environments, for higher ambient-air velocities, the infection probability decreases since droplets are rapidly removed (expose to the virus is minimized).JRC expertise in respiratory virus transmissionJRC scientists have been exploring for years the transmission modes of respiratory viruses and their relative importance. The efficiency of ventilation as a control measure depends on the ambient air velocity.
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