Posted by casper on
URL: https://www.es-forum.com/Trying-to-identify-a-frequency-sound-tp4033510p4033532.html

Clacka clack is the sound of WiFi. Someone has a WiFi router on close by. The sound can carry quite far. Here's a sample:  

https://www.youtube.com/watch?v=QKeSGmp4F4c