Encara no tenim significats per a "completely soundproof".
1It incorporated her 3D projection system, was completely soundproof and was mounted on gyroscopes.
2Description of the interior which is completely soundproof.
3Not only would the prisoner have no idea where he was, but the play place was completely soundproof.
4The windows are one way and the entire floor is completely soundproofed.
5Our cabs are handsomely upholstered in soothing colors and completely soundproofed for the ultimate in comfort.
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