You may have wondered how we came up with the recommendation that women have 500 calories and men have 600 calories on a Fast Day. We used the rule of thumb that women need 2000 calories and men need 2400 calories per day and on a Fast Day you should eat a quarter of a normal dayâs recommended calories. Some of you have also wondered exactly how many calories you should be eating on days when youâre not fasting.
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.
Audible Range of Human Hearing â The average person has a normal hearing range that falls between 20Hz on the low side and approximately 20,000 Hz on the high side.As we age the overall perceivable range of sound decreases especially in the higher frequencies.requency is measured using the Hz symbol meaning Hertz. The chart above shows a total span of frequencies from 20 Hz to 130,000 Hz. Noting that the limitation of the range of human hearing is between 20 Hz and 20,000 Hz one can easily see that frequencies exist outside of our capability to hear them.