A House Within Thirteen Steps by L&M Design Lab Mini Singing Hall

Before & After: A Family of Five Thrives in This Ingenious, 366-Square-Foot Apartment in Shanghai

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This nook was also engineered to function as a mini-singing hall so the grandparents can engage in vocal practice. The rammed-earth wall extends to the bedroom to soundproof this area, and the ceiling was tilted for acoustic purposes. "The narrow space gains a perfect effect of reverberation," says the firm.