Using artificial intelligence (AI) to detect tunneling and other activities

A sensor node comprising:

• a microphone coupled to a structure to which the sensor node is mounted;
• a communication interface;
• one or more processors;
• and
• one or more non-transitory computer readable media storing instructions executable by the one or more processors to perform operations comprising:
• recording, at a first time, first audio data, by the microphone;
• filtering the first audio data to create first filtered audio;
• recording, at a second time, second audio data by the microphone, the second time occurring after the first time;
• filtering the second audio data to create second filtered audio;
• determining a difference in decibels between a first volume of the first filtered audio and a second volume of the second filtered audio;
• determining that the difference in decibels is greater than a predetermined threshold;
• and
• sending, by a communications interface of the sensor node, a notification of intrusion activity, the notification including the difference in decibels, the intrusion activity comprising at least one of:
• a human being engaged in scaling or creating a breach in an above ground barrier;
• a tunneling activity occurring below ground and within a predetermined distance from the structure;
• a vehicle moving within a predetermined distance from the structure;
• or
• any combination thereof.

One or more non-transitory computer readable media storing instructions executable by one or more processors to perform operations comprising:

• recording, at a first time, first audio data, by a microphone of a sensor node that is mounted to a structure, the microphone coupled to the structure;
• filtering the first audio data to create first filtered audio;
• recording, at a second time, second audio data by the microphone, the second time occurring after the first time;
• filtering the second audio data to create second filtered audio;
• determining a difference in decibels between a first volume of the first filtered audio and a second volume of the second filtered audio;
• determining that the difference in decibels is greater than a predetermined threshold;
• and
• sending, by a communications interface of the sensor node, a notification of activity, the notification including the difference in decibels, the intrusion activity comprising at least one of:
• a human being engaged in scaling or creating a breach in an above ground barrier;
• a tunneling activity occurring below ground and within a predetermined distance from the structure;
• a vehicle moving within a predetermined distance from the structure;
• or
• any combination thereof.