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Figure 2 PAR pass rates. A PAR of 25 dB or better was pass criterion level. Dark gray bars represent initial fit-test results for each test procedure (1-, 3-, 5-, and 7-freq). Cross-hatched bars represent experimenter fit, and light gray bars represent subject re-fit following experimenter fit

Figure 2 PAR pass rates. A PAR of 25 dB or better was pass criterion level. Dark gray bars represent initial fit-test results for each test procedure (1-, 3-, 5-, and 7-freq). Cross-hatched bars represent experimenter fit, and light gray bars represent subject re-fit following experimenter fit