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Voice of America

Russia
Part of a jingle that is just voices without any music.
Acapella

Русское Радио

Uzbekistan
the lower end of the music scale at around 60 to 250 Hz. For example, a male voice ranges from 85 to 180 Hz, whereas a female voice is from 165 to 255 Hz.
Bass

Europa Plus

London
Two channels on a mixer are both talking at the same time, like wires crossing paths.
Crosstalk

Наше Радио

London
On-air silence when there is an error made by the staff or due to equipment failure.
Dead air
МУЗ Радио

Russia
The rush hour commuter periods when radio stations usually have their largest audience.
Drive time