You should not rely on the things you hear being correct!
It can be difficult to tell whether noise is too loud for you.
- A change in noise level of 1 dB(A) is almost imperceptible.
- A change of 3 dB(A) halves or doubles the effect of the noise and is registered
- A change of as much as 10 dB(A) is required for the ear to perceive the noise as having been halved or doubled.
- Therefore, the actual load is greater than you think.