This study investigates the production of Arabic intervocalic geminate obstruents as produced by American L2 learners of Arabic. The participants of the study were 24 Arabic learners (12 advanced, 12 beginners) at North Georgia University and 12 native speakers of Jordanian Arabic (the control group). An examination of the results reveals that native speakers of Arabic and advanced Arabic learners pattern similarly while the beginner Arabic learners show a different pattern. Native speakers as well as advanced L2 learners of Arabic maintain a contrast between geminate and singleton consonants in terms of consonant duration while beginner L2 leaners do not. Unlike the case of the beginner L2 learners, the duration of the preceding vowel is found to be shorter before a geminate in native speakers and advanced L2 learners. However, the duration of vowels following a geminate is not affected across all proficiency levels. Further, the results suggest that the place and manner of articulation have no effect on the production of geminate consonants for both native and advanced L2 learners. Finally, voicing of geminates is found to have a significant effect on the duration of geminates, in favor of voiceless geminates, among native speakers and beginner L2 learners.

本研究调查了美国阿拉伯语 L2 学习者所产生的阿拉伯语声母间双生障碍的产生。该研究的参与者是北乔治亚大学的 24 名阿拉伯语学习者（12 名高级，12 名初级）和 12 名以约旦阿拉伯语为母语的人（对照组）。对结果的检查表明，阿拉伯语母语者和高级阿拉伯语学习者的模式相似，而初级阿拉伯语学习者则表现出不同的模式。以阿拉伯语为母语的人和高级阿拉伯语学习者在辅音持续时间方面保持着双辅音和单辅音之间的对比，而初级第二语言学习者则不然。与初级二语学习者的情况不同，母语者和高级二语学习者的前一个元音在双音出现之前的持续时间较短。然而，双音后元音的持续时间不会在所有熟练程度中受到影响。此外，结果表明，发音的位置和方式对母语和高级二语学习者的双辅音的产生没有影响。最后，研究发现，在母语者和初级二语学习者中，清音双音对双音的持续时间有显着影响，有利于清音双音。