Unlike traditional buildings, data centers are equipment-heavy environments required to operate 24/7. Servers and network equipment rely on high-speed, non-stop internal fans as well as large cooling systems like chillers, cooling towers, air-handling units, and pumps to sustain the continuous operation of the facilities. These aspects occupy much of the acoustic profile of a site. Power systems including generators, transformers, and UPS equipment also add to the noise. On top of that, fast-moving air through ducts and raised floors creates constant background sound. The result is a complex mix of broadband and low-frequency noise that rarely shuts off.

“Data center noise is driven by multiple large generators and an exponentially higher amount of outdoor cooling equipment compared to a standard commercial building,” states BrightTree Studios’ Acoustics Discipline Lead Josh Thede. “The rooftops are almost completely covered with noise sources This concentration of mechanical systems, combined with 24/7 operation, makes data centers uniquely challenging from an acoustics standpoint. As Josh Thede explains, there are simply more noise sources, and they’re running all the time.

Why does this matter? Inside these facilities, high noise levels can have an impact on almost every aspect of operation as well as their surroundings. Excessive noise and vibration can affect equipment performance, signal inefficient airflow, and contribute to overheating. It can also affect internal personnel, as these data halls often reach levels that require hearing protection, limiting safe exposure time.

Outside these facilities, noise affects nearby communities. Many data centers are now built close to residential or mixed-use areas, in which noise ordinances are rightfully strict, especially at night. But for technology that runs all day every day, this can be a problem. Low-frequency noise, often from generators, large chillers, and transformers, is especially challenging as it travels farther, passes through walls more easily, and is harder to control. The technology’s progress is almost too fast to keep up with. As Thede points out, “Data centers are scaling and being constructed faster than noise ordinances can be updated to adapt to the new challenges for ensuring compatible sound levels at neighboring properties.”

Here’s the good news: there are ways to be considerate, ethical neighbors and limit harmful noise pollution. Addressing these challenges requires a proactive, integrated design approach. Effective noise mitigation starts with strategic site selection, creating distance between sound sources and noise-sensitive recipients whenever possible. It also means choosing quieter, more efficient systems, which can significantly reduce noise levels, long before mitigation is even required.

“It starts with smart site selection, placing data centers farther from noise-sensitive areas when possible,” states Thede. “Quieter, more efficient equipment can significantly reduce noise at the source. Physical solutions like barriers and enclosures help block sound from the loudest equipment. Additional noise-control measures such as mufflers, silencers, acoustic wraps, and thicker equipment casings target specific problem areas. Exterior sound-absorbing materials can also help reduce reflected noise around the site.”

Ultimately, acoustics in data centers are about smart, long-term planning. Addressing noise early in the design process is in everyone’s best interest; it helps protect worker safety, meet community expectations, and support future expansion. When acoustics are considered alongside audiovisual, telecom, security, and mechanical systems, data centers can operate reliably while minimizing their impact on the people around them. Learn more about our acoustics practice: https://brighttreestudios.com/acoustics-3/