Experimental Studies of the Sound Scattering Coefficient of the Diffuser in the Reverberation Chamber

Abstract Wood charcoal is a sustainable, renewable, and environmentally friendly material with the use that acoustic device can produce. Charcoal made of wood waste materials allows for improving indoor acoustical quality. Therefore, this objective article to investigate sound scattering coefficients QRD perforation ratio oak elements. Sound coefficient calculated measurement reverberation time in chamber. The calculation results show growth frequencies - highest value reached 0.88 (diffuser N7 charcoal). effectiveness diffusers diffuse waves increases as number wells grows. diffuser 80 % elements showed higher compared without