Does a glassless mirror panels have an acoustical dampening properties?

Yes, because of its structural nature, a glassless mirror panel tends to absorb sound rather than reflect it the way a hard polished surface material (such as glass) will. A glassless mirror panel has sound-absorbing properties which become stronger as the frequency (Hz) range grows higher, making the glassless mirror panel particularly effective for public gathering places and schools with high noise levels. ... more