According to most sources, the human hearing (frequency) range is between 20 Hz and 20,000 Hz (bats can hear up to 100,000 Hz!). What does that mean? Sound is a mechanical wave that propagates through a medium (air, water), and the frequency of a sound wave determines its tone and pitch.
A male dog can mate when he's 6 months and older. For females, it's best to wait until they are 2 years old. That way there is less of a chance of miscarrage and she'll have m â¦ ore time to mature and be physically ready for puppies.
The South China Tiger is able to mate at any time of the year but the winter and spring seem to be the most common. Females are ready for mating about 4 years of age and for males it is around 5 years old. It takes about 103 days after mating for the young to arrive.