Mizrahi Hebrew Tiberian notations. After the expulsion of the Sephardi Jews from Spain in 1492, the exiles took the leading position in most Arab and Ottoman countries, and the local pronunciation of Hebrew assimilated to Sephardi Hebrew in many respects, particularly for pronouncing the vowels. Today's Iraqi Jews distinguish between "patach" () and "segol" () in the same way as most other Sephardi and Mizrahi Jews. However, distinct sounds for the guttural and emphatic letters and the sound for "bet rafe" were retained in many Arab countries, probably under the influence of Arabic. Iraqi Jews, like Yemenite Jews, retain the Classical Arabic
Ashkenazi Hebrew from Spain in 1492 (or before) the Sephardic pronunciation of the vowels became standard in all these countries, ironing out any differences that previously existed. This makes it harder to adjudicate between the different theories on the relationship between today's pronunciation systems and those of ancient times. Leopold Zunz believed that the Ashkenazi pronunciation was derived from that of Palestine in Geonic times (7th–11th centuries CE), while the Sephardi pronunciation was derived from that of Babylonia. This theory was supported by the fact that, in some respects, Ashkenazi Hebrew resembles the western dialect of Syriac while Sephardi Hebrew resembles the