Sydneyâs coolest months are June to August when average temperatures drop between 8.8 - 17Â°C (47.8 - 62.6Â°F). Sydneyâs rainfall is generally highest in June, with an average of 132 mm (5.2â), while July is the coolest month when average daytime temperatures reach just 13Â°C (55Â°F). Spring (September â November)
The human ear responds to sounds with frequencies in the range from 20 Hz to 20,000 Hz. This is called the audible range of the human ear.
For waiver consideration, the book says, âHearing loss not greater than 40 db in up to two (2) frequencies beyond the 2000 range standards.â I understand that to mean â if your other freq ranges above 2000 HZ are below 40db loss then the 60db loss at 4000 HZ may be reviewed.