Converter
frequency-weighted sound level · Occupational/environmental acoustics · Modern
A-weighted sound level
exact
- Record
- M566
- Definition quality
- Standardized
- Conversion mode
- contextual
- Calculator
- Context required
Definition
dBA is a decibel sound level after A-frequency weighting, used widely when assessing human hearing risk.
History & use
NIOSH uses 85 dBA over an 8-hour workday as its occupational recommended exposure limit, with a 3-dB exchange rate.
Modern use
Modern use is context-dependent and varies by region or measurement system.