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.
Though dogs can become pregnant at any point once theyâre mature, itâs best to wait until your dog is at least two years old before breeding. For some breeds, like Boxers, you want to wait until they are at least three years old. Simply put, you want your dog to be fully mature before they have puppies.