One of the main modes of transmission and propagation of COVID‐19 (SARS‐CoV‐2) is the direct contact with respiratory droplets transmitted among individuals at a certain distance. There are indoor spaces, such as dwellings, in which the transmission risk is high. This research aims to record and analyze risk close contacts in this scope, experimentally assessing the effectiveness of using electronic proximity warning sound devices or systems. For this purpose, the methodology is based on monitoring the location of the occupants of a dwelling. Then, the days in which a proximity warning sound system is installed and activated are compared to the days in which the system is not activated. The results stressed the significant reduction of time and number of close contacts among individuals when the warning was activated. Regarding the relation between the number and the duration of close contacts, together with the reductions mentioned, the possibility of making certain predictions based on the distributions obtained is proved. All this contributes to the progress in the prevention of COVID‐19 transmission because of close contacts in dwellings.

中文翻译：

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住宅内COVID-19传播风险的距离以及相互接近警告声的有效性评估

COVID-19（SARS-CoV-2）的主要传播和传播方式之一是与个体之间以一定距离传播的呼吸飞沫直接接触。在诸如住宅之类的室内空间中，传播风险很高。这项研究旨在记录和分析此范围内的风险密切联系，通过实验评估使用电子接近警告声音设备或系统的有效性。为此，该方法是基于监视住户的位置。然后，将安装并激活接近警告声音系统的日期与未激活系统的日期进行比较。结果强调，激活警告后，个人之间密切接触的时间和数量将大大减少。关于紧密接触的数量和持续时间之间的关系，以及所提到的减少，证明了基于获得的分布做出某些预测的可能性。由于住宅中的紧密接触，所有这些都有助于预防COVID-19传播。