QRD Sound Diffuser is high effect of sound diffusing function, can beautify the sound quality in huge wide place. 1 QRD Sound DiffuserReflecting faultsIf a person in a flat side wall of the rectangular hall, he heard music heard the voice will be ringing, hard or harsh, this phenomenon is called frequency dyeing effect. 2.QRD Sound DiffuserQRD Sound Diffuser is a kind of irregular plane design, ...