A tightened noseband applies inward or tissue directed pressure (force spread over area F/A) to the supporting tissue beneath it. The pressure will vary from location to location depending upon the shape and conformity of the tissue underneath. The tighter the noseband the more difficult it becomes to lift the noseband away from the tissue at any point. The situation is represented schematically in the adjacent graphics. The tensional forces in the noseband (N) produce an inward directed Load (L) which scales with N or tightness. SafeBand measures this Load L and since the probe height does not change, the load reading provides a simple means of gauging noseband tightness and comparing tightness between animals and at different tissue sites.
In a recent study, a BandSense prototype was used to measure sub-noseband loads on 12 horses with bridles adjusted to various noseband tightness levels set using the ISES gauge – a gauge which is tapered so as to have cross-sectional areas roughly equivalent to adult finger dimensions. Three ISES gauge tightness settings were used: two fingers, one finger and half a finger.