The meditational frescoes in the cells of the convent have a quieting quality about them. Quieting is achieved by absorbing the vibrational energy or minimizing the source of the vibration. Acoustic quieting and noise control can be used to limit unwanted noise. The noise quieting of the Prairie screw works on a different principle. Watts makes a case for quieting the mind by leaving it alone. The psychiatrist Charles E. Stroebel's "Quieting Reflex" (1989) also uses concentration for healing. It was intended to test the potential contribution of natural circulation technology to submarine quieting. It has also improved quieting and sonar. Rather than quieting the protests, this action increased people's suspicion. Alden finally relents, and Mary holds Adam, quickly quieting him. This process is called acoustic quieting. When the goal is acoustic quieting, a number of different aspects might be considered. Both Tanlin and Daoxuan associate this "wall-gazing" with "quieting [the] mind" (). In general his efforts at pre-release self-censorship were unsuccessful in quieting calls for federal censorship. Also on the north bank is the Jingxin Room (Quieting Heart Room).