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.
Dogs may have the surgery as young as 8 weeks of age. Ideally, they will have the surgery before they reach 6 months old. This is the age when females are able to reproduce, so spaying before their first heat (menstrual cycle) prevents any chance of pregnancy.