The background noise of an anechoic chamber refers to the noise value measured inside the anechoic chamber without external sound sources. This background noise level will have a certain impact on the price of the anechoic chamber. The lower the background noise requirement, the more difficult it is to construct the anechoic chamber and the higher the cost. At present, the quietest place in the world that we know is Microsoft's anechoic chamber. They can achieve a background noise level of -20.6DB. This value is already very, very low, and the cost is also very high. In actual work, we usually need the background noise of the anechoic chamber to be below 20 decibels, because many of our product tests only need to be completed below 20 decibels. The most important thing is that the cost is not too high. Of course, if customers require lower local noise, our anechoic chamber factories can also do it, but the cost will be higher. Therefore, when we design the local noise of the anechoic chamber, it is mainly determined by the noise requirements of the product being tested. We only need to use suitable materials and processes to meet the requirements, which can also control costs.

Here are some factors that may affect the price of an anechoic chamber:

1. Material quality: The material quality of the anechoic chamber will directly affect its sound insulation effect and noise reduction ability. Using high-quality soundproofing and noise-reducing materials can effectively reduce background noise levels, but this can also increase costs, which can lead to higher prices.

2. Technological innovation: With the continuous development of science and technology, new sound insulation and noise reduction technologies are constantly emerging. If an anechoic chamber incorporates the latest technological innovations, its background noise level may be lower, but correspondingly, the price may be higher.

3. Design and manufacturing process: The design and manufacturing process of the anechoic chamber will also affect its background noise level. Refined design and manufacturing processes reduce noise leakage, thereby lowering background noise levels. However, this may also require more manpower and resources, increasing costs.

It is important to note that the price of an anechoic chamber does not only depend on the background noise level, but is also affected by other factors such as size, features, additional equipment, etc. Therefore, when choosing an anechoic chamber, in addition to focusing on background noise levels, you should also consider other factors to choose the product that best suits your needs and budget.