- 60-85 dB includes busy traffic and a lawnmower. The WHO recommends limiting daily exposure at these levels.
- The amplitude (pressure or voltage) ratio is 10000.0000. Note that +6 dB doubles amplitude while +20 dB multiplies it by 10.
- Every 10 dB increase represents a 10-fold increase in acoustic power, but humans perceive it as roughly twice as loud (due to the nonlinear response of the ear).
Next stepTo find how a sound level changes with distance, use the inverse-square law: doubling the distance reduces the level by approximately 6 dB.