barking dogs

See at this data below about onomatopeyic sound of bark in different
languages:

Afrikaans: woef
Albanian: ham ham / hum hum
Arabic (Algeria): haw haw
Bengali: ghaue-ghaue
Catalan: bup, bup
Chinese (Mandarin): wang wang
Croatian: vau-vau
Danish: vov
Dutch: woef
English: bow wow, arf, woof, ruff ruff
English (Old English): Hund byrcð.
Esperanto: boj
Estonian: auh
Finnish: hau hau /vuh vuh
French: ouah ouah
German: wau wau, wuff wuff
Greek: gav
Hebrew: haw haw (/hav hav)
Hindi: bho:-bho:
Hungarian: vau-vau
Icelandic: voff
Indonesian: gonggong
Italian: bau bau
Japanese: wanwan, kyankyan
Korean: mung-mung (/wang-wang)
Norwegian: voff / vov-vov
Polish: hau hau
Portuguese (Portugal): au au au (nasal diphthong)
Portuguese (Brazil): au-au
Russian: gav-gav
Slovene: hov-hov
Spanish (Spain, Argentina): guau guau
Swedish: vov vov
Thai: hoang hoang (with falling tone)
Turkish: hav, hav
Ukrainian: haf-haf
Vietnamese: wau wau

Although there exist much variety among this words, I can see some
regularities and tendences:

(1) almost all languages use CVC syllables.
(2) The first consonant is normally a velar-uvular or labial sound.
(3) Syllabic nuclues is almost in each case /aw/ or /u/
(4) Final consonant ususally has teh feature [+ labial]

From this an other observations I think all languages point to a
concrete target: /*G_w-a-B/ or /*x_w-a-B/ (being /G_w/ a voiced
labio-velar and /x_w/ voiceless labio-velar fricative and /B/ a
labial archifoneme: [f], [p] [m] or [w]). See at this putative
adaptations (not actual evolutions!):

Afrikaans-Holandés: /wuf/ < /*wow/ < /*G_waB/
Albanian:/ham ham, hum hum/ < /*hwam hwam/ < /*x_waB/
Árabic /haw haw/ < /*hwaw/ < /*x_waB/
Bengali: /ghaue-ghaue/ < /*Gaw-/ < /*G_waB/
Catalan: /bup, bup/ < /*bwab/ < /*G_waB/
Chinese: /wang, wang/ < /*waM/ < /*G_waB/
Croata: /vau-vau/ < /*waw/ < /*G_waB/
Danish: /vov/ < /*wow/ < /*G_waB/
English: /bow/ < /*bwow/ < /*G_waB/
English: /wow,woof/ < /*wo(:)w/ < /*G_waB/
English: /ruff ruff/ < /*rwow/ (???)
Estonian: /auh/ < /*hwaw/ < /*x_waB/
Finnish: /hau hau/ < /*h(w)aw/ < /*x_waB/
Finnish: /vuh vuh/ < /*wow/ < /*G_waB/
French: ouah ouah < /*wa7/ < /*G_waB/
German: /wau wau, wuff wuff/< /*waw, *wow/ < /*G_waB/
Greek: /gav/ < /*gaw/ < /*G_waB/
Hindi: /bho:-bho:/ < /*b'aw-b'aw/ < /*G_waB/
Italian: /bau bau/ < /*bwaw/ < /*G_waB/
Japanese: /wanwan/ < /*waM/ < /*G_waB/
Japanese: /kyankyan/ < /*kyaMkyaM/(???)
Korean: /wang-wang/ < /*waM-waM/ < /*G_waB/
Korean: /mung-mung < /*bawM-*bawM/< /*G_waB/
Polish: /hau hau/ < /*haw haw/ < /*x_waB/
Portuguese: /au au au/ < /*haw/ < /*x_waB/
Russian: /gav-gav/ < /*gaw/ < /*G_waB/
Spanish: /guau guau/ < /*gwaw/ < /*G_waB/
Thai: /hoàng hoàng/ < /*hwaM/ < /*x_waB/
Turkish: /hav, hav/ < /*haw/ < /*x_waB/
Ukrainian: /haf-haf/ < /*hav/ < /*x_waB/
Vietnamese: /wau wau/ < /*waw/ < /*G_waB/

It would be interesting to examie de phonogram of a dog barking and
try to see in it if is similar to the average pronunciation of /*G-w-
a-B/

David Sánchez