1 202 and 1 203 after the 0 10 u2033 compression 10 of the bpfs increased slightly and 1 increased dramatically the result was that 5 bats became slightly non compliant with bpfs in the range 1 201 1 204 and 5 remained compliant with bpfs in the range 1 186 1 199 the remaining bat acquired a bpf of 1 226 after the 0 20 u2033 compression all of the bats became non compliant with bpfs over 1 200 the conclusion is that compressions in the 0 15 u2033 0 20 u2033 range are sufficient the increase the bpfs of all tested bats over the 1 20 limit the reason that bat compressions improve bat performance is that these compressions soften the bat this softening is demonstrated by measuring the force required to compress each bat 0 05 u2033 after each pre compression with no pre compression the forces were typically in the range 500 600 lbs after the 0 20 u2033 compression all of the bats softened considerably requiring 0 05 u2033 compression forces in the range 300 400 lbs this corresponds to the fact that all the bats acquired bpfs above 1 200 after the 0 20 u2033 compression as an exhibition of some of the acquired data the fig7 graph of bpf verses the forces required to compress each bat 0 07 u2033 comp this graph displays how bpf increases as the compression force comp decreases the fact that the individual trend lines.