Quilts and carpets can of course absorb the high frequencies of certain frequency domains, and pillows can also absorb a little, but that’s all a shot in the dark, you simply do not know that you are to absorb those frequencies, the amount of absorption is how much? Nowadays, there are many acoustic processors in brick-and-mortar shops or on the Internet, the price is not high, to buy those professional acoustic treatment materials to use than quilted carpet pillows are better.
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