The noise level in a laboratory can vary depending on the specific purpose and requirements of the laboratory. Here are several different types of laboratories and their corresponding noise standards:

Ordinary laboratories:

Generally, it should be kept below 30 decibels. Such an environment is relatively quiet and suitable for most experimental operations.

Some standards mention that the noise level in a laboratory should be below 40 decibels, which is equivalent to an environment where people can talk quietly.

Laboratories with high acoustic requirements:

For laboratories that require precision acoustic testing or have special requirements, the noise level should be below 30 decibels or even lower.

In some extreme cases, such as semi-anechoic laboratories, the noise level should be kept below 20 decibels.

For laboratories with extremely strict requirements, the noise level even needs to be below 15 decibels.

Special laboratories:

The background noise level in laboratories that test the noise of household appliances is required to be below 40 decibels or even lower.

Noise generated by mechanical equipment:

The noise generated by mechanical equipment is generally required to be below 70 decibels.

Other reference standards:

Some literature mentions that the maximum allowable noise level in a laboratory does not exceed 60 decibels.

It should be noted that these standards are not mandatory regulations, but recommended values. The actual noise control of the laboratory also needs to be determined according to the specific functions and needs of the laboratory. For example, if there are large mechanical equipment such as air compressors, circulating water tanks or vacuum pumps in the laboratory, the noise level may increase significantly to 80~95 decibels.

For laboratory noise measurements, it is generally recommended to be conducted about 1 meter away from the sound source equipment, and to avoid direct exposure to locations such as vents that may generate additional noise.

Finally, in order to ensure that the laboratory noise level meets the requirements, noise control measures need to be considered during the design phase of the laboratory, such as using low-noise equipment, taking sound insulation and sound absorption measures, etc.