Discharge is your bodies natural way of cleaning itself. If you use douches, DON'T. They are really bad and cause your bodies natural PH to be washed away which can cause the bad stuff like the bacteria that cause yeast infections to take over......not fun.
The commonly stated range of human hearing is 20 Hz to 20 kHz. Under ideal laboratory conditions, humans can hear sound as low as 12 Hz. Humans are most sensitive to (i.e. able to discern at lowest intensity) frequencies between 2,000 and 5,000 Hz.
Compared to humans, dogs and cats have a much different range of hearing. Humans can hear sounds in the 64 Hz (low sounds) to 23 kHz (high sounds) range. By comparison, a cat has a range of about 45 Hz to 64 kHz and a dog has a range of about 67 Hz to 45 KHz.