The sound-absorbing wedge is an important sound-absorbing structure in anechoic chambers, and its manufacturing method involves multiple aspects such as material selection and structural design. The following are the steps for making a sound-absorbing wedge based on search results:
 
1. Material selection
 
The materials for making sound absorption wedges are usually porous (or fibrous) materials, such as glass wool, soft foam plastics, etc. These materials have good sound absorption properties and can effectively absorb sound wave energy.
 
2. Structural design
 
The structural design of the sound-absorbing wedge is the key to its production. The sound-absorbing wedge is usually composed of a frame, sound-absorbing materials filled inside the frame, and a protective layer wrapped outside the frame. Among them, the protective layer is often made of flexible mesh material, but some also use metal perforated plates instead.
 
3. Production process
 
The specific production process may vary depending on the manufacturer, but generally speaking, the first step is to create a frame for the sound-absorbing spikes according to the design drawings, then fill the frame with sound-absorbing material, and finally cover it with a protective layer. In this process, it should be noted that the filling of sound-absorbing materials should be uniform, and the coverage of the protective layer should be tight to ensure the sound absorption effect of the sound-absorbing spikes.
 
4. Performance testing
 
The completed sound-absorbing wedge needs to undergo performance testing to ensure that its sound absorption effect meets the design requirements. Performance testing usually includes testing of indicators such as sound absorption coefficient and cutoff frequency. The sound absorption coefficient refers to the proportion of sound energy absorbed by the sound-absorbing material to the incident sound energy, while the cutoff frequency refers to the lowest frequency that the sound-absorbing wedge can effectively absorb.
 
The above is the basic manufacturing method of the sound-absorbing cone in the anechoic chamber. It should be noted that due to the complex acoustic principles and techniques involved in the production of sound-absorbing wedges, professional technicians are required to operate them in the actual production process.