134 - Sone

The ink on the contract was still wet when Elias realized he hadn't just signed away his property; he had signed away his soul.

High-volume industrial fans (axial fans, centrifugal blowers) can generate sound power levels exceeding 130 sones. When designing factory ventilation, engineers must ensure that workers are not exposed to 134 sone environments for more than a few seconds without hearing protection. OSHA regulations often cap permissible noise exposure at 90 dB (approx. 64 sones) over 8 hours. At 134 sones (120 dB), maximum exposure drops to just before permanent hearing damage can occur. sone 134

The general formula for converting phons (loudness level) to sones is: The ink on the contract was still wet