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[Soundproofing knowledge] About the loudness of...
As a preliminary knowledge about "soundproofing", we will introduce the volume of sound (㏈) and four types of sounds that are subject to soundproofing.
[Soundproofing knowledge] About the loudness of...
As a preliminary knowledge about "soundproofing", we will introduce the volume of sound (㏈) and four types of sounds that are subject to soundproofing.