Exemplary turbine blade outer edges, exemplary vane inner edges, exemplary systems and exemplary methods are disclosed that help to reduce noise in variable geometry turbines and optionally other turbines wherein a turbine blade interacts with an object. The apparatus includes a fixture with a mounting surface adapted to receive the microstructure device. The tightening shoe further has a locking mechanism for locking said at least one lace in a tightened condition and a release mechanism for unlocking the locking mechanism and releasing the shoe laces. The method also includes inserting a scintillator material into a cavity of a housing defined by an annular sidewall of the housing.