Let's analyze the mechanisms of the energizing by broadcasts. All kinds of broadcasts: speech, songs and music are very energizing for me. At the same time they have some negative effects.
For example, some of sounds interfere with my creative writing. Ideally, I would need quietness for writing. A quiet music with no words is sometimes acceptable. Songs and speech in familiar languages is interfering strongly with my thinking and writing. Songs in unfamiliar languages usually are fine since they produce little interference. I sense that I am using a sort of biological speech processor in my brain which has trouble multitasking. I utilize this speech processor for logical thinking and converting thoughts to text I am writing down and this is why external speech is interfering with my thinking and writing. Interestingly, when I think Russian, Russian language is interfering with my thinking much stronger than English and vice versa. This makes sense.