  === Resonance Frequency for different skulls=== In the C++ language, at least that included in a Turbo C++ compiler by Borland I used in the 1990's, there is a statement regarding the sound frequency programming that does not allow the 7 hz frequency to be generated by the computer. The reason given is that is the resonant frequecy for the chicken skull. It gave a story that this fact was discovered when motors from a factory that caused 7 hz vibrations had killed large numbers of chickens in a nearby chicken farm.   How does one determine the resonant frequecy for the skulls of other types of animals? Is there a relieable formula or how does one proceed to tune in the right frequency?   Dictionaries commonly refer to 'cranium' as the part of the skull containing the brain. The opening sentence here uses 'cranium' as a synonym for 'skull.’ That includes the facial bones, jaw etc., correct? I thought the common usage for 'cranium' was maybe a little imprecise, but this article suggests that it's completely wrong. It might be worth nailing this point down in some way. Larry Holyoke 3/12/05  :No, cranium is identical to skull. The neurocranium contains the brain, and the viscerocranium the rest.  |    :Here are all the major divisions of the skull bones I'm aware of: *skull = the whole thing. *mandible = lower jaw *cranium = skull, minus the satanic side *splanchnocranium (viscerocranium) = facial bones *neurocranium (calvarium) = braincase *calotte = upper bones of braincase, (term rarely used)  [Source: White, T.D. 1991. Human osteology. Academic Press, Inc. San Diego, CA.]    21:30, 2005 Mar 12 (UTC)  ::hmm... Mosby's Dictionary has cranium for bones containing the brain, specifically frontal, occipital, sphenoid, ethmoid, temporal, and parietal. for skull it has 8 bones of cranium + 14 of face. it has no entry for neurocranium, splanchnocranium, or calotte. Cranium = braincase is what I learned.      What's up with the first paragraph under Humans?  The last sentence is incomplete.  I'm on tenterhooks, wondering just what I can count.   * Hope I answered that. =-)    Foramen ovale must be wrong in the list in this article, as it is a hole in the heart, not the skull. I doubt that anatomist have given the same name to two different structures