A material has a TL of 30 dB in the 125-Hz octave band. Based on the mass law, calculate the TL of two layers (double mass) of this material at 31.5 Hz
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3. A material has a TL of 30 dB in the 125-Hz octave band. Based on the mass law, calculate the TL of two layers (double mass) of this material at 31.5 Hz.
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Could you possible write out the step 2 part? It looks really confusing
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