This is the 9211th most frequent Russian word.
слышат
"Слышат" means "hear" (they hear).
In this sentence, 'слышат' is used in a literal sense, meaning 'to perceive sound through hearing'.
Дети слышат музыку в соседней комнате.
The children hear music in the next room.
Here, 'слышат' implies attention and understanding in addition to the act of perceiving sound.
Они всегда слышат меня, когда я говорю им что-то важное.
They always listen to me when I tell them something important.
In this context, 'слышат' is used to describe a capability or instance of perceiving sound despite barriers.