Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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SCIENCE

The Claim

Sound can have a negative decibel level.

Verified by Lenz ·

The Short Version

Sound can indeed have negative decibel levels. The decibel scale uses a logarithmic ratio formula, so any sound intensity below the chosen reference point mathematically produces a negative dB value. This is confirmed by multiple academic physics sources and occurs in both digital audio systems and theoretical acoustic measurements.

Caveats

  • Negative decibel values depend entirely on the choice of reference point—the decibel scale is relative, not absolute
  • In standard acoustic measurement, negative dB represents sounds quieter than the threshold of human hearing, which are rarely encountered in practice
  • The claim lacks context about when negative decibels are actually measured versus when they're just mathematically possible

The Receipts

  1. The Decibel Scale

    Hanover College - Auditory System

  2. Keep Listening | What Are Safe Decibels?

    Hearing Health Foundation

  3. Intensity and the Decibel Scale - The Physics Classroom

    The Physics Classroom

  4. Sound Intensity – University Physics Volume 1

    University Physics Volume 1

  5. 17.4: Sound Intensity - Physics LibreTexts

    Physics LibreTexts

  6. Interpretation of negative decibels - Audacity Forum

    Audacity Forum

  7. Decibel Scale (video) | Sound - Khan Academy

    Khan Academy

  8. What Do Negative Decibels Mean

    Oreate AI Blog

  9. dB: What is a decibel?

    Physclips

  10. dB: What is a decibel? - Physclips

    Physclips

+ 3 more sources — see the full list on Lenz