Auralex Metro

Auralex Acoustics is a company that produces products that aid in speaker/sound production. Its Metro series range from studiofoam panels, bass straps to sound diffusors.

A 2 and 4 inch studio foam affords minimal installation seaming due to the left and right edges being similar in height.
For a 2 inch studio foam, because of the Metro's moderate and linear acoustical action, the variety of installations yield a satisfactory and natural sound effect.
The protrusions' variable heights serve to spread sound energy outwards in the time domain. Due to this, a Metro room will exhibit more resonance than a room that's treated with a more efficient absorber, and when coupled with a fair number of MetroFusors, a well-balanced, natural-sounding effect will occur.

With a frequency of 125 Hertz, the NRC is 0.13. With a frequency of 250 Hertz, the NRC is 0.23. With a frequency of 500 Hertz, the NRC is 0.68. With a frequency of 1 kHz, the NRC is 0.93. With a frequency of 2 kHz, the frequency is 0.91. With a frequency of 4 kHz, the NRC is 0.89. The mean NRC would then be 0.70.

For a 4 inch studio foam, with frequency of 125 Hertz, the NRC is 0.31. With a frequency of 25 Hertz, the NRC is 0.72. With a frequency of 500 Hertz, the NRC is 1.19. With a frequency of 1 kHz, the NRC is 1.26. With a frequency of 2 kHz, the NRC is 1.22. With a frequency of 4 kHz, the NRC is 1.20. The mean NRC would be 1.10.

An Auralex Metro LENRD Bass Traps(Low-End Node Reduction Device) is a triangular shaped bass trap that provides excellent broadband absorption. With a frequency of 125 Hertz, the NRC is 1.17. With a frequency of 250 Hertz, the NRC is 1.15. With a frequency of 500 Hertz, the NRC is 1.28. With a frequency of 1 kHz, the NRC is 1.20. With a frequency of 2 kHz, the NRC is 1.15. With a frequency of 4 kHz, the NRC is 1.12. The mean NRC would then be 1.20.