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What specific impact does the cavity depth on the sound absorption effect of the acoustic panel's back?
The cavity depth primarily affects the position of the low-frequency absorption peak. A deeper cavity results in better absorption of lower frequencies (for example, a 100mm cavity can significantly improve the low-frequency absorption coefficient around 125Hz). It is recommended to adjust the cavity depth between 50mm and 200mm, with a 50mm cavity being the generally recommended depth, effectively enhancing low-frequency performance without significantly sacrificing space.