Noise level refers to a measure of the size or intensity of a certain sound.

In the process of noise detection, multiple indicators are used to analyze and measure noise. Among them, noise level refers to an important indicator for measuring sound intensity, measured in decibels (dB) of sound pressure. The noise level is often measured in decibels (dB) to represent the magnitude or quietness of different noises. By summarizing the sound pressure values of various sound sources, the noise level in this area can be represented.



The classification of noise levels is usually based on the decibel values of noise in different environments. Generally, the noise level can be divided into three levels: A, B, and C. The corresponding decibel values are as follows:

Level A: below 50 decibels;

Level B: 50 decibels to 70 decibels;

Level C: Above 70 decibels.


One decibel is about the sound that a person can just feel. A suitable living environment should not exceed 45 decibels and should not be lower than 15 decibels.

According to the hearing of ordinary people:

0-20 decibels are very quiet and almost imperceptible

20-40 decibels quiet, as if speaking softly

40-60 decibels general indoor conversation

60-70 decibels noisy and nerve damaging.

70-90 decibels are very noisy and nerve cells are damaged.

9-100 decibels: Increased noise and hearing loss.


The above is the main overview of noise levels. Due to the varying levels of noise tolerance among different regions and enterprises, noise levels may also vary with regional changes. If noise exceeds the basic tolerance range, it may affect people's physical and mental health. Therefore, noise level is a very important indicator that must be accurately detected according to corresponding standards to protect environmental and personal health.