Can Data Centers Manage Issues Related to Infrasound?

Yes, infrasound (typically <20 Hz) and associated low-frequency noise can be managed at data centers, though it is more challenging than controlling higher-frequency sound. Long wavelengths penetrate barriers more easily, attenuate slowly with distance, and are poorly captured by standard A-weighted (dBA) measurements. Significant reductions are achievable through engineering controls and planning. Management is both technically feasible and increasingly standard practice, especially when source-level aerodynamic and operational improvements are combined with adequate setbacks and path treatments.

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1. Source Control (Most Effective Approach)

Reducing noise generation is preferred over blocking it later:

• Variable-speed drives and lower fan speeds: Fan noise scales roughly with the fifth power of rotational speed. Running fans slower (via variable-speed operation or improved system efficiency) yields large noise cuts during partial loads.
  
  
• Aerodynamic modifications: Computational fluid dynamics (CFD)-designed inserts or retrofits to cooling fans can reduce low-frequency tonal "hum" or blade-pass tones by 10–20 dB (90–99% reduction in some cases). These often improve airflow, raise efficiency (examples report 18–23% lower fan power at the same cooling duty), and can be self-financing through energy savings.
  
  
• Equipment selection and mounting: Specify quieter chillers, cooling towers, air handlers, and generators. Re-engineer fan mounts or use vibration-isolation mounts to limit structure-borne transmission.
  
  
• Liquid cooling: Shifts heat rejection away from large, high-speed air fans, reducing a primary source of continuous low-frequency output.
  
  
• Acoustic metamaterials and liners: Thin, tuned absorbers (tested on server racks for low-to-mid frequencies) show promise and can be extended toward lower frequencies.

2. Path Control

• Longer, frequency-tuned silencers on intakes/exhausts (standard short silencers perform poorly below ~100 Hz).
  
  
• Acoustic enclosures, shrouds, and louvers around chillers, generators, and turbines.
  
  
• Perimeter barriers, earth berms, or walls (useful but less effective for very low frequencies due to diffraction around edges).
  
  
• Building orientation and mass shielding so that other structures block line-of-sight to neighbors.

3. Site Planning and Operations

• Increased setbacks (often the most reliable and cost-effective long-term solution) allow natural distance attenuation.
  
  
• Orient noisy equipment away from residences and schedule generator testing for daytime hours only.
  
  
• Early acoustic modeling (octave-band or narrow-band analysis, plus C- or G-weighting) during design prevents expensive retrofits.

Challenges and Realities Specific to Infrasound/Low Frequencies

Traditional barriers and short silencers underperform against tones below ~100 Hz or true infrasound. Complete elimination is rarely practical, but targeted reductions of the most annoying tonal components are routinely achieved. Specialized firms now offer infrasound-specific measurement (using appropriate sensors and weighting) and mitigation design for data centers. Regulatory trends are shifting toward requiring low-frequency metrics rather than dBA alone.

Best Practices

Integrate acoustics from the earliest design stages (site selection through equipment procurement). Require detailed manufacturer sound-power data that includes low-frequency content and tonality. Combine source treatments with path controls and adequate setbacks. Post-construction verification measurements confirm performance.

In summary, management is both technically feasible and increasingly standard practice. Prioritizing source-level aerodynamic and operational improvements often delivers the best combination of noise reduction, cost, and energy efficiency. Facilities that treat low-frequency noise as a primary design parameter from the start experience fewer community complaints and smoother permitting.

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Citations

Industrial Noise & Vibration Centre. (n.d.). Low-cost high efficiency data center noise reduction. https://invc.com/noise-control/data-center-noise-attenuation

Acentech. (2025, November 6). Good noise neighbor. https://lab.acentech.com/2025/11/06/good-noise-neighbor/

Narrative review authors. (2026). Infrasound and low-frequency noise in data center environments: A narrative review toward health-protective acoustic design standards. Environments, 8(4), Article 126. https://www.mdpi.com/4020294

Additional Reading Suggestions

Suicidal Empathy (Amazon Affiliate Program)

The Nerd Reich: Silicon Valley Fascism and the War on Democracy (Amazon Affiliate Program)

If you are going to have your drinking water tested using informational water testing, please consider using the NTL Mail Order Testing Service (Well Water / City Water).

Other Websites

Know Your H20
B.F. Environmental Consultants
Carbon County Groundwater Guardians
Keystone Clean Water Team (Donate)

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