This is the 17859th most frequent Russian word.
услышать
To hear.
Here 'услышал' means actively perceiving a specific sound that catches one's attention.
Я услышал мелодию, которую давно искал.
I heard the melody I was looking for a long time.
In this context, 'услышать' is used figuratively to imply paying attention and understanding the essence of the advice.
Она всегда знает, когда нужно услышать совет.
She always knows when to listen to advice.
Here 'услышать' means being unable to distinguish a sound due to external interference.