Both these Such actions can turn the volume down when sound dB through the walls, 50 (A) and volume.Lower sound walls through to accept a maximum equal to 25 dB (A)).
However, such operations can reduce noise through noise 50 dB (A) noise level, and reduced noise when it passes through. Will accept a maximum of 25 dB (A)).
However, such operation can reduce noise down when through the soundproof walls 50 dB (A) and pitch.Decreased when around through the soundproof walls are acceptable maximum at 25 dB (A)).