Russian military shortwave radio station UVB-76, also known as "The Buzzer" was jammed and play some rap and "Slava Ukraini" words.
UVB-76, also known as "The Buzzer", is the nickname given by radio listeners to a shortwave radio station that broadcasts on the frequency 4625 kHz. It broadcasts a short, monotonous buzz tone, repeating at a rate of approximately 25 tones per minute, 24 hours per day. Sometimes, the buzzer signal is interrupted and a voice transmission in Russian takes place. The first reports were made of a station on this frequency in 1973.
The station is commonly known as the Buzzer in both English and Russian. Up until 2010, the station identified itself as UVB-76 (Russian:УВБ-76), and it is still often referred to by that name. In September 2010, the station moved to another location, and used the identification MDZhB from then onwards. On December 28, 2015, the station began using the callsign ZhUOS – pronounced "Zhenya, Ulyana, Olga, Zinaida".
The station transmits using AM with a suppressed lower sideband (R3E), but it has also used full double-sideband AM (A3E). The signal consists of a buzzing sound that lasts 1.2 seconds, pausing for 1–1.3 seconds, and repeating 21–34 times per minute. Until November 2010, the buzz tones lasted approximately 0.8 seconds each. One minute before the hour, the repeating tone was previously replaced by a continuous, uninterrupted alternating tone, which continued for one minute until the short repeating buzz resumed, although this stopped occurring in June 2010.
The Buzzer has apparently been broadcasting since at least 1973 as a repeating two-second pip, changing to a buzzer in early 1990. It briefly changed to a higher tone of longer duration (approximately 20 tones per minute) on January 16, 2003, but it has since reverted to the previous tone pattern.
Sometimes the buzzing sound is interrupted and a voice message is broadcast. These messages are usually given in Russian by a live voice, and follow a fixed format.