The short version: 3-5 weeks in the shell. Healthy. Any egg can go bad, of course, but undamaged eggs will last many weeks in the fridge and I've read studies that have even claimed to have edible eggs after a year at room temperature.I don't refrigerate the eggs that my chickens lay and have yet to see one go bad. have a flock of free range chickens and my unwashed eggs last over 6 months in sealed containers in the fridge. I had unwashed eggs at room temperature for over 3 months with no problem at all. I had 6 unwashed eggs out of the sealed container in the fridge for 8 months and they were good to eat.
The Science of Hearing. The human hearing range is between 20 to 20,000 Hz. There is considerable variation. in the hearing range between individuals. Most young people can hear up to 18,000. Hz. Our ability to hear high frequencies declines with age. By the age of 55 some men. can't hear above 5,000 Hz and some women canât hear above 12,000 Hz. Women tend. to have better hearing than men at high frequencies.
Humans can hear frequencies from about 20 hertz to 20 kilohertz, dogs from about 20 hertz to 40 kilohertz, and cats from about 30 hertz to 60 kilohertz. âCats are capable of hearing the very high pitch of high-frequency sounds â it would appear three times as high and ones that humans canât detect.umans can hear frequencies from about 20 hertz to 20 kilohertz, dogs from about 20 hertz to 40 kilohertz, and cats from about 30 hertz to 60 kilohertz. âCats are capable of hearing the very high pitch of high-frequency sounds â it would appear three times as high and ones that humans canât detect.