Perception in English listening ability is identifying the sounds and comprehension is understanding the words.
First, listen to 2 minutes of the below audio without thinking about the meaning of the words, only listen and retain the words in your mind. Imagine the shape of words and notice the first and last letters of the said words.
The second step:
The third step:
Final step: listen to the very first audio again! you find that processing the words has been eased for you.