Fig. 13 | Scientific Reports

Fig. 13

From: Graphene-infused terracotta acoustic sound amplifiers

Fig. 13

The figure shows the loudness comparison plots for normal and graphene-based terracotta amplifiers with water addition. The black color line indicates the loudness of the normal amplifier in the presence of moisture. In contrast, the red color line indicates the loudness variation for the graphene-based amplifier in the same moisture environment. The graphene-based terracotta amplifier shows higher loudness than the normal terracotta across the initial moisture levels.

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