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Micro-Phonetic Influences on Syllabification

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Micro-Phonetic Influences on Syllabification ICPhS XVII Regular Session Hong Kong, 17-21 August 2011 MICRO-PHONETIC INFLUENCES ON SYLLABIFICATION Manjari Ohalaa & John J. Ohalab aSan José State University, USA; bUniversity of California, Berkeley, USA [email protected]; [email protected] ABSTRACT and velar places of articulation, and all of these form clusters with homorganic stops, (or in the How should one syllabify medial homorganic nasal case of the palatal nasal, the following obstruent is plus stop (-VNCV-) clusters in Hindi such as those the palatal affricate). However, based on the usual in [ ] ‘tall’ and [ ] ‘pebble’? A variety criteria for phonemic analysis, only the bilabial of principles have been proposed by phonologists, and dental/alveolar nasals are considered the three most common ones being the ‘legality’ phonemes. A few linguists such as Kelkar [4] and principle, ‘maximize onset’ principle, and the Dixit [3] have posited the velar nasal to be a ‘sonority sequencing’ principle. In this paper we phoneme based on a few Sanskrit loans such as will attempt to show that all -VNCV- clusters do [va m j] ‘literature’. With regards to not behave alike and that phonetic factors such as syllabification, Kelkar [4] posits VN.CV for all the voicing of the following stop and the duration homorganic nasal plus stop clusters (where the of the nasal also have to be taken into account. period denotes the syllable boundary). Although Thus, along with phonological factors, micro- such a break would obey the 'maximize onset' phonetic factors also play a role in syllabification. principle, it would violate the 'legality' principle in Keywords: phonetics, syllabification, Hindi, nasal the case of the retroflex, palatal, and velar nasal in and stop duration the -VNCV- clusters: it violates the phonotactic constraints of Hindi since these three nasals do not 1. INTRODUCTION form legal codas. Syllabification is said to serve various functions 2.2. A psycho-phonological study such as differentiating certain minimal pairs, such as the well-known English set, nitrate and nightrate In an attempt to access the mental reality of and to determine certain allophonic variation such syllabification of medial -NC- (homorganic nasal as the presence or absence of aspiration on the plus stop) clusters for native speakers of Hindi, medial /t/ in the same example. Phonologists have Ohala [5] reported on an experiment conducted proposed a variety of principles that are claimed to using a word game.1 cover those and virtually all cases of syllabification. In this paper we provide experimental evidence 2.2.1. Method from Hindi demonstrating that syllabification of Subjects were told that a new game for children medial homorganic nasal plus stop clusters, -NC-, was being devised in which the vowel [ɪ] would be is not only influenced by phonological factors such inserted in the middle of a word. They were given as the ‘legality principle’, ‘maximize onsets’, and two examples which involved inserting the vowel the sonority hierarchy (Pulgram [7], Clements and before a single intervocalic consonant, e.g., [ʧhʊpa] Keyser [2], Clements [1]) but also by micro- ‘hidden’ → [ʧhʊɪpa] and for intervocalic clusters, phonetic details such as the duration of the nasal, its inserting the vowel between the CC, e.g., [bsta] place of articulation, and the duration of the ‘knapsack’ → [b sita]. The training session then following stop which in turn depends on whether it is voiced or voiceless. continued where they were to apply these processes to 45 word, which included 22 words 2. BACKGROUND with intervocalic single consonants (such as 2.1. Hindi nasals [bdam] ‘almond’) and 23 with a variety of intervocalic two-consonant clusters (e.g., [sɪski] First some details about such nasals in Hindi need ‘sob’, [ʧaplus] ‘flatterer’, [ʧkla] ‘round platter for to be given: At the phonetic level Hindi has nasals rolling dough’) but none of which contained -NC- at the bilabial, dental/alveolar, retroflex, palatal, 1534 ICPhS XVII Regular Session Hong Kong, 17-21 August 2011 clusters, the ultimate focus of the experiment. For plus voiced stop. Thus, we see that -NC- clusters their responses to these 45 words they were given do not all behave alike. feedback of “correct” or “incorrect” and if incorrect, the correct answer was provided. 3. THE PRESENT STUDY Thirteen correct answers in a row was set as the Given the results of Ohala [5], the present study criterion that they had learned the insertion rule but addressed the following two questions: (a) why all 45 training words were presented even if the did the voicing of the following stop play a role in subjects had already reached this criterion (so that subjects' syllabification responses? Could this be all subjects would have equal chance at hearing all because the duration of the nasal is different before the words and the correct answer to any incorrect voiceless stops than before voiced ones? If the responses.) At the end of the training session the duration of the nasal is long in comparison to that test session started during which no feedback was of the following voiced stop, it may account for the given. Subjects were not told when the training preference not to break the cluster (i.e., the percept session ended and the test session started. The test of a ‘cluster’ might be very weak). (b) Why did session contained 25 items, 15 with -NC- clusters the velar nasal not pattern similar to the retroflex and 10 control items (i.e., words similar to the and palatal nasals? In other words, why did training session): 4 with intervocalic single subjects not syllabify between the -NC- and consonants and 6 with clusters not consisting of - change the place of articulation of the velar nasal NC-. These words also acted as a control to make to dental/alveolar (in order to conform to the sure the subjects had indeed learned the word phonotactic constraints) as they did in the case of game. The NC clusters included the bilabial, the retroflex and palatal nasal plus stop clusters? dental/alveolar, retroflex, palatal and velar, nasals Could it be that the voiced velar nasal is rather followed by homorganic stops (both voiced and long and the voiced velar stop after it too brief to voiceless). give the percept of a cluster? 2.2.2. A summary of the results 3.1. Duration of nasals and voiced and In the case of the bilabial and dental/alveolar nasal voiceless stops in homorganic nasal plus stop plus homorganic stop clusters, the results showed clusters that a VN-CV break is justified. The majority of 3.1.1. Method the subjects did break the cluster after the nasal. As mentioned above the bilabial and the To study this, a randomized list of 28 words were dental/alveolar are the only two nasals that occur spoken by four native speakers of Hindi (one male freely, i.e., are unarguably phonemic. The and 3 female) and digitally recorded and analyzed responses to the other NC clusters were more using the software Praat. There were 3 words for complex. In the case of the velar nasal the each of the 5 nasal types except for the retroflex overwhelming response was to keep the nasal plus nasal, for which there were only two words. The stop cluster intact. Thus a VN-CV syllabification words were said in the frame [vo___kho] ‘say would not be justified. For the retroflex and that ___’. palatal places of articulation, there was no clear preference between keeping the NC intact vs. 3.1.2. Analysis breaking the cluster but in the latter case changing Amplitude changes in the wave form, amplitude the place of the nasal to dental/alveolar, changes in the spectrum (i.e., spectral presumably due to pronunciation constraints since discontinuities), pitch changes, were all used as these nasals only occur before homorganic landmarks for the onset and offset of the nasal. consonants. However, there was a clear preference We also listened to the segments. The burst of the not to break up the cluster while retaining the stops was not included in measuring the duration original place of articulation of the nasal. of the stop. A two-way ANOVA was conducted Interestingly, her results also showed that the separately for the nasal duration and the stop voicing of the following stop seemed to play a role duration, 5 places of articulation by two voicing in subjects' responses. Subjects made a clear conditions. choice not to break up the cluster in the case of N 1535 ICPhS XVII Regular Session Hong Kong, 17-21 August 2011 3.1.3. Results whose duration was markedly longer than that of the nasals at other places. A boxplot of the There was considerable variation in the values distributions is given in Fig. 2. measured, no doubt due to the different speaking As for the duration of the stop, the ANOVA styles of the four subjects, nevertheless, the showed a highly significant effect due to voicing ANOVA conducted on the nasal duration showed a (F-ratio = 144.8135, p < .000) and a significant significant effect due to the voicing of the effect due to place (F-ratio =9.7551, p < .000). In following stop (F-ratio = 21.5, p < .00001). A the latter case it was the palatal stop (which is boxplot of the distributions is given in Fig. 1. actually the closure part of the palatal/palato- Figure 1: Boxplot of the distributions of the duration alveolar affricate) that was markedly shorter than of the nasal consonant before voiced stops (left) and the stops at the other places. Boxplots of the voiceless stops (right). Vertical axis here and in the other figures gives fractions of a second.
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