abies have an astonishing talent that adults entirely lose. By the age of one, they can recognise the significant noises in the babble around them and group them into a language. When we have lost this capacity as adults, it becomes enormously difficult to distinguish between sounds that are glaringly different to a native speaker.
But I'm not sure what this has to do with the headline. So I'll quote from the abstract of the actual research paper (not from the body of the document, which I can't see without spending money or knowing the secret handsh... erm... password.
Human speech manifests itself in spectacular diversity, ranging from ubiquitous sounds such as “m” and “a” to the rare click consonants in some languages of southern Africa. This range is generally thought to have been fixed by biological constraints since at least the emergence of Homo sapiens....Chewing roots and seeds altered what in phonetics classes we learnt to call "the buccal tract" – the stuff that we use to make vocal sounds: the teeth, palate, lips and so on. The suggestion is
[W]e expect that any change in the human apparatus for production, perception, or learning affects the probability—or even the range—of the sounds that languages have. Paleoanthropological evidence suggests that the production apparatus has undergone a fundamental change of just this kind since the Neolithic. Although humans generally start out with vertical and horizontal overlap in their bite configuration (overbite and overjet, respectively), masticatory exertion in the Paleolithic gave rise to an edge-to-edge bite after adolescence...
... that this post-Neolithic decline of edge-to-edge bite enabled the innovation and spread of a new class of speech sounds that is now present in nearly half of the world’s languages: labiodentals, produced by positioning the lower lip against the upper teeth, such as in “f” or “v.”
Biomechanical models of the speech apparatus show that labiodentals incur about 30% less muscular effort in the overbite and overjet configuration than in the edge-to-edge bite configuration. This difference is not present in similar articulations that place the upper lip, instead of the teeth, against the lower lip (as in bilabial “m,” “w,” or “p”). Our models also show that the overbite and overjet configuration reduces the incidental tooth/lip distance in bilabial articulations to 24 to 70% of their original values, inviting accidental production of labiodentals.
Interesting stuff. I'm inclined to believe it, but also to wonder what other coincidental environmental changes affected (and sometimes, perhaps, caused) other phonological differences: why, for example, Hawaiian has 13 phonemes but other languages have several times that (Danish, for example, has 4 times as many, and Lithuanian has even more (two examples taken from this EU document ...
<digression>... but still); why click consonants are confined to a handful of South African languages....
Some of these figures look a bit off to me. Does Portuguese have only 9 diphthongs (as claimed in that EU document)? They must be ignoring something – nasals, I suspect. My bible for information about Continental Portuguese is a typescript, possibly later published by L. W. Keates. He lists 10 oral diphthongs and 4 nasal diphthongs – two of which can be combined to form the triphthongs heard in words such as têm and põem. However you count it, that looks to me like more than 9.
Maybe, as is so often the case, the authors of that EU document have been led astray by the Internet default position that
which would be ridiculous in a document dealing with languages spoken in Europe. But I know next to nothing about Brazilian Portuguese, so won't speculate further.
Another case of environment moulding language occurs to me, but I have notes and words to learn for next Saturday's concert (mentioned before in this blog, here), so I'll save it for an update.
Update: 2019.03.25.11:10 – Added PS
Another case where environment has affected not phonology but vocabulary is that of Proto-Indo-European. I vaguely remember some research cited by Joe Cremona (see this blog, passim [that's Latin for 'So often that I can't be bothered to check a reference']). The research placed the origins of PIE on the basis of vocabulary. Indo-European langages are spoken today in all kinds of environment, but common words like pond...
Ancient Greek lakkos, Latin lacus, German lagu/, Irish loch/loch, Old Armenian լիճ (lič), English lagu/--, Lithuanian lekmenė, Albanian lumene, Old Norse lǫgr, Serbian lokva, Russian лужа (luža) (puddle)?
Lithuanian ežeras, Latvian ezers, Old Church Slavonic jezero, Russian озеро (ozero), Illyr. oseriates, Ancient Greek Akherōn, Polish jezioro, Slovak jazero, Czech jezero, Old Prussian assaran Source
Latin aqua, Russian Ока (Oka), Gothic aha, German aha/Ache, English īg/island, Sanskrit ap, Hittite akwanzi, Luwian ahw-, Palaic aku-, Old Norse á, Gothic aƕa
Lithuanian vilkas, Latvian vilks, English wulf/wolf, Gaulish vail, Latin lupus, German wolf/Wolf, Ancient Greek lukos, Albanian ujk;ulk, Sanskrit vṛka, Avestan vehrka-, Tocharian --/walkwe, Persian varka/gorg, Old Prussian wilkis, Gothic wulfs, Old Norse úlfr, Old Church Slavonic vlĭkŭ, Russian волк (volk), Polish wilk, Slovak vlk, Kurdish/Zazaki gurg/verg, Luwian walwa, Welsh gweilgi, Pashto lewë, Serbian vuk Source
Tocharian laks/läks, Old Norse lax, Lithuanian lašiša, Latvian lasis, Russian лосось (lososʹ), Polish łosoś, Slovak losos, German lahs/Lachs, English leax/--, Old Prussian lalasso
But that's enough navel-gazing for now. :-)
<For_further_research but="not by me">Enough I said.
Proposed study: on a possible relation between the number of phonemes used in a language and the per capita length of the coastline surrounding its speakers: e.g. Hawaiian versus Danish.