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.
At what age can a dog have her first litter? Puberty (the age at which animals can reproduce) in the dog is usually between 5 and 12 months of age. This is when a dog will have her first heat. Some large breed dogs may not have their first heat until they are almost 2 years old.