DOSSIER
DIGITAL LIFE
The relentless and invisible cost of AI data centers
The heartbeat of the artificial intelligence economy sounds like the low-frequency hum of a neighbor's central air conditioning unit, a plane flying at high altitude, or a truck engine idling on the highway.
But it feels more like the vibrant, rhythmic pulse of a subwoofer from a never-ending party. Yes, the cloud has a sound, and some of the people living closest to the data centers emitting this noise have reached the limit of their patience trying to block it out.
Last month, residents of three small towns filed lawsuits against data centers specifically because of the noise.
The United States has more than 3,000 data centers in operation and another 1,500 under development, according to an analysis by the Pew Research Center. They have been the backbone of the information economy for decades, operating largely behind the scenes of everyday life.
The demands of artificial intelligence (AI), much greater amounts of computing power, and cooling infrastructure have triggered an explosion in the construction of new data centers.
Today, nearly 40% of homes are located less than 8 kilometers from at least one operational data center, according to Pew, and more and more are moving closer to residential areas.
The hum of cooling systems, the roar of generators, and the noise of fans can be heard—and felt—hundreds of meters away and even more than a kilometer.
"The acoustic footprint is simply different by orders of magnitude," said Les Blomberg, executive director of the nonprofit Noise Pollution Clearinghouse.
"Body-shaking thumping"... Part of this noise consists of infrasound, extremely low-frequency sound waves that fall below the threshold of human hearing.
Instead of hearing these very low frequencies, people physically feel them with pressure fluctuations, similar to the deep vibration of a beat shaking the body during a concert, explained Scott Hamilton, a member of the Acoustical Society of America and a consultant on data center projects.
This can make traditional noise indicators and solutions for attenuating it inadequate to meet modern needs.
Residents living near infrasound sources frequently report chronic sleep deprivation and insomnia, headaches, internal ear pressure, and anxiety. Often, legislation doesn't help.
Legislation geared towards parties...Noise pollution is regulated at the local level by a complex network of zoning laws, originally designed to deal with noisy parties, barking dogs, or construction noise, and not the constant industrial hum of a data center operating 24 hours a day.
There is also not much support at the federal level, because the Reagan administration defunded the Environmental Protection Agency's (EPA) Office of Noise Control and Reduction in the early 1980s.
Although regulations exist, "there is no one at the EPA effectively in charge of enforcing them," said Richard Neitzel, a professor of environmental health sciences at the University of Michigan.
"They used that office as an example of over-regulation, as if the government didn't have the right to tell me how noisy my lawnmower can be," he stated.
Now, residents are trying to fill this regulatory gap.
Compensation for damages...The three lawsuits argue that, although data centers generally comply with basic zoning codes, the constant hum and vibrations cause significant property devaluation and loss of the right to peace and quiet for neighboring homeowners.
The plaintiffs seek damages and also want the companies to improve noise control measures.
In Vineland, New Jersey, a group of homeowners filed a lawsuit in federal court motivated, in part, by fears that even more noise is yet to come.
"There's a constant noise from machines running, which is most noticeable at night when we're trying to sleep," said Stefanie Bartiromo, a local resident, referring to the three server rooms already in operation, according to the lawsuit. "It sounds like a helicopter that never leaves the ground and sometimes a heavy truck running non-stop."
The lawsuit was filed against DataOne USA, which is expanding its campus in Vineland. When completed, the company's complex will cover approximately 241,000 square meters and require 300 megawatts of power, enough to supply a medium-sized city.
DataOne stated that it has already taken steps to reduce the noise and will continue to do so as the expansion is completed.
Committed to dialogue..."We remain committed to constructive dialogue and to our role as a valuable and responsible member of the community in the long term," a company spokesperson said in a statement.
The company stated that it intends to generate jobs and boost the local economy. The same economic argument was presented by the other companies sued over noise, years after they repurposed former industrial land in Dowagiac, Michigan, and Lowell, Massachusetts.
Residents of Dowagiac had been complaining about a 30-megawatt data center installed in a building that was previously used primarily to store boats and recreational vehicles.
The data center's owner, Alliance Cloud Services, recently purchased an additional 50 acres of forested land as it plans to expand its energy consumption capacity from 30 to 300 megawatts. Part of this area will serve as a natural barrier against the impacts of the project, according to the company.
— We would offer to buy these properties at market value and provide a subsidy to help cover relocation costs — he stated, referring to residents living next to the data center.
24-hour noise...The core of the problem, according to Neitzel, is that many traditional sources of community noise — such as airports and highways — tend to decrease in intensity at night.
This is not the case with data centers. In Lowell, Diana Streete stated that the noise “regularly interferes with my family’s ability to sleep, rest, relax and comfortably enjoy our home.”
— My children’s bedrooms face the entrance area, where trucks circulate and facility activities take place, which makes the noise especially disruptive — she said.
Lowell, a city of 115,000 inhabitants, was founded as a textile hub in the 19th century, but its factories closed in the early 20th century. The site where the data center now operates previously housed the Lowell Bleachery and Dye Works and, later, for six decades, the Prince Spaghetti factory. The data center, spanning approximately 32,500 square meters, is located next to residences and recreational facilities, including a park and a baseball field.
Its owner, Markley, stated that the complex supports the digital infrastructure of public safety agencies, universities, local hospitals, and other regional institutions.
It is a colocation data center, a shared facility where multiple companies rent space to house their computing equipment. This is different from hyperscale data centers, built to meet the needs of large global technology companies.
A Markley spokesperson stated that the generators are tested weekly and that the sound produced remains within established limits.
Hamilton noted that there is a wide variety of sounds and, equally wide, is the way people perceive them. According to him, current standards are developed for the average person.
To combat noise, the industry is migrating to liquid cooling systems. Instead of using noisy fans to propel air, servers are submerged in special non-conductive fluids or equipped with liquid-cooled cold plates installed above the processors that generate heat.
This can reduce data center noise by more than 50%, but the installation cost is much higher.
Dowagiac, a town of 5,700 inhabitants, had a general noise law, like many communities, but recently established decibel limits for ambient noise in residential, commercial, and industrial zones.
Most communities set their standards using the A-weighted decibel scale, designed to mimic human hearing in quiet environments and which significantly reduces—or ignores—low-frequency sounds emitted by data centers, according to experts.
The C-weighted scale, on the other hand, was created to capture low-frequency noises.
This distinction is especially important when measuring data center noise, dominated by low-frequency hums produced by enormous cooling equipment fans, explained Neitzel. As a consequence, Blomberg stated, a sound source that clearly dominates a person's auditory perception may not be registered as a problem on a conventional decibel meter.
The CEO of Hyperscale Data, the parent company of Alliance, stated that its operations are within the decibel limits permitted by the city and that it uses systems that minimize energy consumption.
The executive, William B. Horne, said he would attend a city council meeting to speak with residents and emphasized his commitment to being a reliable partner.
"But when you work in this field long enough, you end up finding—or experiencing—highly sensitive people," Hamilton said. "These people really perceive sounds, vibrations, and intensities that the average human being considers irrelevant and thinks, 'That's not a problem, I don't know what you're talking about.' But they are genuinely tormented by it."
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