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.
However, this results in extremely high frequencies, far higher than those that any known species can perceive (some bats can hear frequencies as high as about 250,000 Hz). Rodents can generally hear higher frequencies than humans. It's difficult to give an average frequency for the hearing ability of rats, but it would be much higher than for people. The hearing range for rats is about 200-75,000 Hz. Beyond that, I can't really answer your question, as I'm not really sure what you are requesting; hopefully this helps somewhat!