You can access the DAME hanbook on the casa website; should have all the details there re what is tested etc
You can link to it
here. Helpful stuff but no specific details.......
Table 67.150 of CASR 1998 (
here) defines the actual requirements as -
Hearing requirements
1.29 Is not suffering from any safety-relevant hearing defect
1.30 If suffering from a hearing loss (measured in a quiet room using a
properly calibrated, compensated audiometer) in either ear of more
than:
(a) 35 dB at any of the frequencies of 500 Hz, 1 000 Hz or 2 000 Hz;
or
(b) 50 dB at 3 000 Hz —
passes a speech discrimination test, or an operational check, carried out
by an approved person in an aircraft of similar ambient noise level to
that in which the person being tested is or will be operationally
involved