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.
The EM spectrum is the range of all possible frequencies of electromagnetic waves. At one end of the spectrum are the waves with the lowest frequencies. At the other end are the highest frequency waves. The spectrum is broken up into regions that define each of the different wave types.