A baffle system comprising: a mounting structure adapted to be mounted to a substrate (302, 402); and a baffle unit (100, 150, 408, 502a, 502b, 602a, 602b) coupled to the mounting structure, the baffle unit (100, 150, 408, 502a, 502b, 602a, 602b) comprising: an elastic member (108, 156); and at least two baffle blades (104, 106, 154), each baffle blade (104, 106, 154) having a first edge (104a, 106a, 154a) and a second edge (104b, 106b, 154b), wherein each baffle blade (104, 106, 154) has its first edge (104a, 106a, 154a) coupled to the elastic member (108, 156), wherein each baffle blade (104, 106, 154) rotates about and deforms the elastic member (108, 156) in response to aerodynamic forces applied to the at least two baffle blades (104, 106, 154) wherein the aerodynamic forces applied to the at least two baffle blades are created by an airflow source directing airflow over the substrate, characterized in that the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the mounting structure, wherein the mounting structure comprises: a vertical support having a fixing channel therein; and an angled support having a fixing channel therein, wherein an end of the angled support is movably coupled to the fixing channel of the vertical support, wherein the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the fixing channel of the angled support, wherein the end of the angled support that is movably coupled to the fixing channel of the vertical support can move within the fixing channel to change the angle of the angled support relative to the vertical support. a mounting structure adapted to be mounted to a substrate (302, 402); and a baffle unit (100, 150, 408, 502a, 502b, 602a, 602b) coupled to the mounting structure, the baffle unit (100, 150, 408, 502a, 502b, 602a, 602b) comprising: an elastic member (108, 156); and at least two baffle blades (104, 106, 154), each baffle blade (104, 106, 154) having a first edge (104a, 106a, 154a) and a second edge (104b, 106b, 154b), wherein each baffle blade (104, 106, 154) has its first edge (104a, 106a, 154a) coupled to the elastic member (108, 156), wherein each baffle blade (104, 106, 154) rotates about and deforms the elastic member (108, 156) in response to aerodynamic forces applied to the at least two baffle blades (104, 106, 154) wherein the aerodynamic forces applied to the at least two baffle blades are created by an airflow source directing airflow over the substrate, characterized in that the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the mounting structure, wherein the mounting structure comprises: a vertical support having a fixing channel therein; and an angled support having a fixing channel therein, wherein an end of the angled support is movably coupled to the fixing channel of the vertical support, wherein the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the fixing channel of the angled support, wherein the end of the angled support that is movably coupled to the fixing channel of the vertical support can move within the fixing channel to change the angle of the angled support relative to the vertical support. an elastic member (108, 156); and at least two baffle blades (104, 106, 154), each baffle blade (104, 106, 154) having a first edge (104a, 106a, 154a) and a second edge (104b, 106b, 154b), wherein each baffle blade (104, 106, 154) has its first edge (104a, 106a, 154a) coupled to the elastic member (108, 156), wherein each baffle blade (104, 106, 154) rotates about and deforms the elastic member (108, 156) in response to aerodynamic forces applied to the at least two baffle blades (104, 106, 154) wherein the aerodynamic forces applied to the at least two baffle blades are created by an airflow source directing airflow over the substrate, characterized in that the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the mounting structure, wherein the mounting structure comprises: a vertical support having a fixing channel therein; and an angled support having a fixing channel therein, wherein an end of the angled support is movably coupled to the fixing channel of the vertical support, wherein the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the fixing channel of the angled support, wherein the end of the angled support that is movably coupled to the fixing channel of the vertical support can move within the fixing channel to change the angle of the angled support relative to the vertical support. a vertical support having a fixing channel therein; and an angled support having a fixing channel therein, wherein an end of the angled support is movably coupled to the fixing channel of the vertical support, wherein the second edge (104b, 106b, 154b) of one of the at least two baffle blades (104, 106, 154) is fixed to the fixing channel of the angled support, wherein the end of the angled support that is movably coupled to the fixing channel of the vertical support can move within the fixing channel to change the angle of the angled support relative to the vertical support.