Gaston Leroux. The Phantom Of The Opera (№ 7246)

Heart, which he didn't feel up to it, loudly beating in his chest. It seemed to him that the echo of the blows rang through the halls and ears. He both hands covered his heart, trying to drown it out. However, this is not a dog's mouth, and then, even if you keep both hands on the mouth of a hysterically barking dogs will still hear its growl.