There are some baffles on the market, which are made by installing rubber layer, vibration damping material or soundproof felt between the two plates. In this way, the sound insulation effect can be improved to some extent in a short period of time, but the sound insulation effect will be Gradually decrease with time. It is well known that materials such as rubber slowly age in the air, causing them to gradually harden and lose their elasticity, resulting in a gradual decrease in sound insulation over time. On the other hand, the practice of installing a rubber layer or a sound-insulating felt layer between the two plates is also very expensive.
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