I don't know the full story behind that but repetitive, rhythmic sound, makes me think they are talking about the old mans breathing.
But i'm not sure
Answer:
I walked up to the door and rang the bell. I asked if Ricky was home. Ms. Lasko said Ricky was fishing with his Aunt Bertha. Fishing sounded like a good idea, so Iwent home to get my pole and bait.
Explanation:
1.humor
2.onomatopoeia
3.dont know
