@lionfromnorth This chapter was released 5 months ago in Japan, and they're still regularly releasing chapters today, so I dont think so.
We're just approaching the climax, so its normal for the pace to speed up.
Isn't hardening himself to the point that no sound passes through him kinda impossible? I think that you'll have to liquify yourself or something like that. It's because the harder an object is, the more pact the molecules are... That'll make the vibrations pass through way easier...