Abstract: A device which includes a microphone configured to detect a noise from a surrounding area of the device; an electronic circuit coupled to the microphone, wherein the electronic circuit comprises (i) at least one low-pass filter configured to filter the detected noise and (ii) a frequency-to-voltage converter configured to convert a frequency of the filtered detected noise into a voltage; a machine learning unit comprising a processor and a memory, wherein the processor is configured to analyze the detected noise using a machine learning algorithm stored in the memory; and an alarm unit configured to receive, from the machine learning unit, information on the analyzed detected noise and to receive, from the electronic circuit, the voltage.