Table 2.

Acoustic property of different type of concretes.

Type of Concretes	Maximum Coefficient of Sound Absorption	Level of Sound Reflection	Maximum Decrease in Sound Level at Frequencies, Hz	Refs.
Normal concrete	0.05–0.10	High	3000–5500	[52,57]
Aerated concrete	0.15–0.75	Low	250–2500	[44,72]
Foamed concrete	0.13–0.50	Low	100–2000	[51,61]
Crumb rubber concrete	0.30–0.70	Medium	400–2500	[3,54]
Polyurethane concrete	0.08–1.0	Low	150–1400	[55,60]
Coal bottom ash concrete	0.05–0.31	Medium	500–3500	[41,58]
Coconut fibers concrete	0.42–0.80	Medium	1250–3200	[59]
Recycled aggregate concrete	0.01–1.0	Medium	1500–2000	[60]
Oyster shell waste aggregate concrete	0.43–0.53	Low	1000–1800	[73]
Polymer concrete	0.90–1.0	Low	64–1600	[55]
Glass-based concrete	0.20–0.37	High	250–3150	[61]