Table 12.

Result from one-way ANOVA: effect of waste fiber/filler on 3D glass fabric composite (3DGFC).

Frequency (Hz)	Waste Fiber Type	Mean dB Difference	F-Value	p-Value
1000 Hz	Palm fiber	6.0	11.5	0.02
1000 Hz	Coffee husk	5.1	10.8	0.03
1000 Hz	None	2.5	8.5	0.04
10,000 Hz	Palm fiber	28.4	35.2	0.002
10,000 Hz	Coffee husk	31.0	37.1	0.001
10,000 Hz	None	19.9	30.5	0.005