Riders quickly learn to quieten their minds so as to not excite their horses. Photographers can quieten noisy still cameras on a film set using sound blimps. They said that he was encroaching land and hiring goons to quieten them. Hub's bad behaviors seem to be level out and things quieten for the family. Barney Black, their leader, decides to wait until things quieten down before retrieving the loot. The players left the field for 20 minutes in an attempt to quieten the crowd. This knowledge is applied in acoustical engineering to study how to quieten aircraft.