Acoustic Knowledge Hub
Master the terminology of noise control.
A-weighted equivalent continuous sound level. The most common metric for occupational noise exposure.
Daily noise exposure level normalized to an 8-hour working day (ISO 9612).
The maximum C-weighted instantaneous sound pressure level. Critical for impact noise assessment.
Areas where noise levels exceed 85 dB(A) (or 80 dB(A) depending on regulation), requiring mandatory hearing protection.
A percentage value representing noise exposure relative to the maximum allowable daily limit (100%).
The amount by which the permitted sound level decreases as the exposure time doubles. Usually 3dB (ISO/EU) or 5dB (OSHA).
The average noise exposure level for a specific time period, usually 8 hours.
A physical obstruction designed to block or reduce noise propagation from a source to a receiver.
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