Whether it is a HiFi speaker or a home theater, or a recording studio or cinema, the speaker system will interact with the room. National standards related to construction usually stipulate the sound insulation performance indicators of houses, but they usually do not involve the treatment of reflected sound. Usually if a room does not receive any acoustic treatment, no matter how good the speakers are, they will encounter bottlenecks due to room interference. At this time, acoustic treatment materials can be said to be a necessity.
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