Nodding flowers are best adapted for the long hummingbird beak. Hummingbirds intrigue with their tiny bodies and rapidly fluttering, buzzing wings. They are a joy to watch and planting a garden to attract hummingbirds is rewarding. When planning, there is more to consider than color when choosing plants.
So, while pretty much everyone can hear frequencies of 8,000 Hz, most people over the age of 40 canât hear 15,000 Hz. Note that YouTube has compressed this video so, unfortunately the 19,000 Hz frequency has been lost. But that doesnât matter to me because I didnât come anywhere close to being able to hear it. Sigh. Go and watch the video above to find out how young (or old) your ears really are and prepare to be depressed.
The commonly stated range of human hearing is 20 Hz to 20 kHz.[6][7][note 1] Under ideal laboratory conditions, humans can hear sound as low as 12 Hz[8] and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditory channel of the cochlea.[9] Humans are most sensitive to (i.e. able to discern at ...