Normal people's voice belongs to mixing. Normal voice is generally about 40 decibels, and when you speak quietly, it is about 30 decibels. Only when you speak loudly will it reach 60-70 decibels. The decibel value in normal life is not too high, and it may reach about 100 decibel only in noisy environment.

The decibel index of the surrounding sound is too high, which easily affects the nerve cells in the ear. Therefore, if you want to avoid ear diseases, you must not be in a noisy environment for a long time.

Self-test instrument

0 dB: just audible sound.

/kloc-below 0/5 db: I feel quiet.

30 decibels: the volume of a whisper.

40 decibels: the hum of the refrigerator.

60 decibels: the sound of normal conversation.

70 decibels: equivalent to walking downtown.

85 dB: The car is on the road.

95 decibels: motorcycle starting sound.

100 decibel: the sound of decorating electric drill.

1 10 dB: karaoke, play MP3 loudly.

120 decibel: the sound when the plane takes off.

150 dB: the sound of fireworks.