‘It’s aliens! :’ Sewer technology causes mysterious music in homes and toilets

By | September 21, 2022

SALT LAKE CITY – Residents of downtown Salt Lake Metropolis mentioned they heard music amid the development.

Musician Rosemary Olsen lives downtown, one block east of State Avenue. She mentioned she heard a raised B chord repeatedly exterior her window.

“It is actually bizarre, but it surely was stunning,” Olsen mentioned.

She posted in regards to the unusual sounds on Nextdoor, a social media platform for neighbors to work together with one another.

“Lots of people mentioned, ‘They’re aliens! ‘” she mentioned. “A number of; he was saying in any other case, ‘Oh, that was my group coaching, that was imagined to be a minor seventh. I assume we screwed it up.

The Salt Lake Metropolis Division of Utilities mentioned the noise got here from sewer expertise that has been in use since 2015.

“We’re deploying tones within the sewer line to determine if there are any blockages within the system that we are able to filter,” Director Laura Briefer mentioned.

The expertise is known as Sewer Line Speedy Evaluation Instrument, or Sewer Rat. A transmitter is positioned on a upkeep gap and a receiver on one other a number of meters away.

“One will emit the tone and the receiver will hear for the tone,” mentioned sewage assortment supervisor Steve Terry. “The receiver, because it listens to this tone, will give it a rating as as to whether the pipe is open and unobstructed.”

A change in quantity signifies that there’s some form of blockage or cleanup to be carried out. The Sewer Rat offers every sewer pipe a grade and a numerical rating.

“Issues like flushable wipes can clog our sewer strains with issues like grease, oil, and grease,” Briefer mentioned.

She mentioned the expertise retains staff out of confined areas, away from waste and is environmentally pleasant.

“We’re dramatically lowering the quantity of water and vitality required to carry out a standard waterline evaluation,” Briefer mentioned.

Olsen mentioned she discovered the notes pleasing to the ear.

“I believed it was very all the way down to earth work they usually turned it into one thing ethereal and delightful,” she mentioned.

She has a query for the expertise builders.

“Why did they select an elevated settlement? Does it have extra thrust, does it have extra energy? Olsen mentioned.

Briefer mentioned residents are inspired to report what they hear to the division.

“A whole lot of occasions the work we do is out of sight and out of thoughts, and I do not assume folks actually notice all that goes on behind the scenes and underground,” she mentioned.