Working low-frequency assessment band for the data-center hum (fans, dry-coolers, transformers) that dBA discounts and dBC/octave criteria capture
20-200 Hzestimate
| Value kind | estimate — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | This is the guide’s illustrative audible low-frequency assessment band, not a measured industry-wide spectrum. Leventhall defines low-frequency noise as roughly 10–200 Hz; Bray and Dominici report data-center tones near 70–140 Hz in the cases with spectral detail. |
| As of | 2026-10 |
| Source | H. G. Leventhall, Low frequency noise and annoyance, Noise & Health 6(23):59–72 (2004), roughly 10–200 Hz; Bray & Dominici, narrative review, arXiv 2610.03975 (2026-10-02; authors report acceptance for publication in Noise & Health), tones near 70–140 Hz in cases with spectral detail. · Leventhall 2004, definition of low-frequency noise; Bray & Dominici 2026, cases with spectral detail |
| Review | checking…review by 2027-10-02 · standard cadence |
| Recorded changes | last 2026-10-15 · 2 revisions tracked |
| Claim id | low-frequency-noise-band-of-the-data-center-hum |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.