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The results of measuring the sound absorption by acoustic wedges, which were performed in AC 3 and AC 11 reverberation chambers at the Central Aerohydrodynamic Institute (TsAGI), are presented. Wedges of different densities manufactured from superfine basaltic and thin mineral fibers were investigated. The results of tests of these wedges were compared to the sound absorption of wedges of the operating AC 2 anechoic facility at TsAGI. It is shown that basaltic fiber wedges have better sound absorption characteristics than the investigated analogs and can be recommended for facing anechoic facilities under construction.

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