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Name: Pedro
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Question:
Is there a frequency which all birds can listen to but man can't? For example dogs have a specific frequency which they can listen while we don't. Thank you for your help.


Replies:
Hi Pedro!

that question was already answered by NEWTON in 2003. Look at the archives. But there are academic studies and publications as The Journal of the Acoustical Society of America -- November 1978 -- Volume 64, Issue S1, p. S4 Permissions for Reuse "Behavior and psychophysics of hearing in birds R. Dooling Field Research Center, Rockefeller University, Millbrook, NY 12545 Psychophysical investigations of hearing in a number of avian species over the last decade have added significantly to our knowledge of hearing capabilities characteristic of this vertebrate group. Behavioral measures of absolute auditory sensitivity in a wide variety of bird species show a region of maximum sensitivity between 1 and 5 kHz with a rapid decrease in sensitivity at higher frequencies. On the basis of this general measure, birds fall between two other major vertebrate groups: reptiles and mammals. Discrimination and masking data from birds include measures of frequency, intensity, and duration difference limens; critical ratios, critical bands, and psychophysical tuning curves. There are also data on temporal summation, temporal resolving power, and temporary threshold shift from noise exposure. Taken together these data suggest that, in the region of 1­5 kHz, birds show a level of hearing sensitivity similar in most respects to that found for the most sensitive members of the class Mammalia with avian performance clearly inferior above and below this range of frequencies. Possible exceptions to this general picture must include the echolocating oilbird and growing evidence that pigeons are sensitive to infrasound at moderate intensity levels. The relation among critical ratio, critical band, and intensity difference limen measures in the parakeet is similar to that described for the human, but the pattern of masking as a function of frequency is dramatically different from that observed in mammals. Examples of a correspondence between hearing sensitivity and vocalizations can be demonstrated in a number of species. ©1978 Acoustical Society of America"

And beeing a brazilian i am glad that someone from
Brasil is profiting from Newton!
Thanks for asking us!
Mabel (Dr. Mabel M.Rodrigues)


Because of the great diversity of birds, I don't think we could say there is a frequency that "all" birds could hear that humans can't. Many songbirds appear to hear in frequencies higher than we can, but larger birds probably have hearing ranges more like ours.

J. Elliott


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