Some speculation based on
@Martian2's research.
Seawolf/Virginia: 95 decibels
Ohio: 100 decibels
Type 095: 95 decibels
Type 093B: 95 decibels
Type 094B: 105 decibels
According to our big shrimp, the Type 093B was designated to counter against the Virginia class, although not fully on par, but it is comparable on many areas like the noise level and speed.
I was initially conservative to believe that the Type 093B's noise signature is around 100 decibels, but later Martin has proved that the Type 093B is going to the road of the 95 decibels with the integration of many new technologies to pave the road for the Type 095.