Original sentence: At about 3:23 into the song, a sonar-like sound, similar to the ping in "Echoes", is heard
Edited sentence: "Hey You" has a very desperate tone which steadily grows as the song progresses, and there has been much debate as to what the lyrics symbolise, though it is generally agreed that the song is about isolation from one's peers, whether it be Pink, the listener, or both.At about 3:23 into the song, a common Floydian technique of recycling sounds occurs when a sonar-like sound, similar to the ping in "Echoes", is introduced, adding to the atmosphere of isolation and emptiness.The song itself is inspired by the very concept The Wall was made for: the feeling of despair and isolation from one's peers