"I've been told to get another place but that's easier said than done."
"I used to sleep like a baby."
Mr Madsen kept a diary, and flicking through that showed him the noise first woke him up in the early hours of the morning more than a year ago.
He said the noise was so low that he described it as a vibration, and he doubted it would be loud enough to record.
"I thought I was going mad before my time, you know, but its not just me. Other people are complaining about it," he said.
Anecdotally, he had heard that people living in Trafalgar Street, Bartholomew Road and Goldsmith Crescent had heard the same noise, which suggested it was widespread.
He said he was standing in line at the Post Office and overheard people in front of him discussing the noise, and other people he had spoken to were aware of it.
He said it was comforting to know he was not alone.
Mr Madsen had been in contact with HDC noise control officers "three or four times", although so far they were unable to help in locating the source of the noise.