San Jerónimo Acazulco Otomi (SJAO) is an underdescribed and endangered Oto-Manguean language spoken in central Mexico. This paper provides an analysis of the phonology of tonal contrasts in SJAO and the phonetics of their realization based on pitch pattern data derived from audio recordings of citation forms of SJAO words. Each SJAO lexical word has one and only one tonal sequence – either /H/ or /HL/. This sequence is underlyingly associated with one syllable in the word. Other syllables are not specified for tone, and their phonetic realization is predictable depending on their position relative to the tonal syllable. A phonetic analysis revealed that underlyingly-tonal syllables are phonetically distinct from non-tonal syllables: those with /H/ are produced with greater vocal effort (measured by spectral tilt), and those with /HL/ are longer, louder, and bear a higher f0 (fundamental frequency), compared with non-tonal syllables. This analysis differs from previous accounts of lexical prosody in other Otomi varieties, which have either described a three-way system of high, low, and rising tones contrasting on every stem syllable, or a system where one syllable per word is assigned a stress-like ‘accent’. This difference from previous analyses suggests that there is a third possible characterization of lexical prosody for Otomi, which is appropriate for SJAO and potentially other understudied varieties.

We examined the production of the Irish initial mutation eclipsis in two speaking styles. In initial mutation phenomena, a word appears with a different initial sound depending on the lexical or morphosyntactic environment (e.g. croí [kɾɣi] ‘(a) heart’ (radical form), (a) chroí [xɾɣi] ‘(his) heart/darling’ (séimhiú-lenition form), and (a) gcroí [ɡɾɣi] ‘their heart/darling’ (eclipsis form)). The goals of the study were:

1. (i) to examine whether there are acoustic differences between the initial consonants of radical word forms (e.g. [ɡ] of gruig ‘(a) frown/scowl’) and the corresponding consonants of eclipsis forms (e.g. [ɡ] of gcroí), as has been found for similar phenomena in other languages;

2. (ii) to examine variability in the patterns of initial mutation in the speech of present-day speakers of Irish.

Our analyses offer limited evidence that there may be phonetic differences between radical and corresponding eclipsis consonants, but the current data do not allow us to rule out alternative explanations. The realization of initial mutations in semi-spontaneous speech differed dramatically both from that of read speech and from the expectations of the traditional grammar. The results suggest that the realization of eclipsis and other initial mutations may be style- or register-dependent. We also found some evidence that it may vary by consonant type, in part due to phonological frequency patterns of the language.

Very few segments of the world's languages have been shown to have a systematic effect on the fourth formant (F4). We investigate a large drop in F4 which sometimes occurs in conjunction with the flap in American English. The goal of the present work is to document this phenomenon, and to determine what phonological environments coincide with this large drop in F4. We measure data from six speakers producing words with medial flaps in various environments, such as party, turtle, bottle, credit, harder. We find that the combination of flap with a rhotic and to a lesser extend a syllabic // leads to a larger drop in F4 than other flap combinations like a following /i/. Together with previous perceptual data, the findings support the conclusion that this feature of F4 results from transitions among articulations.

This article reports a study of acoustic phonetic variation between ethnic groups in the realisation of the British English liquids /l/ and /ɹ/. Data are presented from ‘Anglo’ and ‘Asian’ native speakers of Sheffield English. Sheffield Anglo English is typically described as having ‘dark’ /l/, but there is some disagreement in the literature. British Asian speakers, on the other hand, are often described as producing much ‘clearer’ realisations of /l/, but the specific differences between varieties may vary by geographical location. Regression analysis of liquid steady states and Smoothing Spline ANOVAs of vocalic–liquid formant trajectories show consistent F2−F1 differences in /l/ between Anglo and Asian speakers in non-final contexts, which is suggestive of a strong distinction between varieties in terms of clearness/darkness. There is also evidence of a polarity effect in liquids, with differing relationships between liquid phonemes in each variety: Asian speakers produce /l/ with higher F2−F1 values than /ɹ/, and Anglo speakers produce /ɹ/ with higher F2−F1 values than /l/. The results are discussed in terms of phonetic variation in liquids and socioindexical factors in speech production.

There is no consensus on the nature, or even the existence, of Vietnamese word stress. While some authors have proposed that it is morphosyntactically conditioned (Thompson 1963, Thompson 1965, Cao 2003 [1978], Ngô 1984), others have adopted the view that it is consistently word-final (Trần 1967; Nguyễn & Ingram 2006, 2007b; Phạm 2008; Nguyễn 2010) or that it lacks stress altogether (Emeneau 1951). This is due to the elusive nature of word prominence in Vietnamese, and to the small number of studies that tackle the issue experimentally. In this paper, acoustic experiments designed to test previous hypotheses and tease apart possible types of prominence are presented. Southern Vietnamese disyllabic words with various morphosyntactic structures were recorded in controlled environments to test for stress and phrasal effects. Their duration, mean intensity, mean f0, f0 range and formants were then measured to assess word prominence. Results suggest that there is little evidence for word stress in Southern Vietnamese and that reports of final stress can be reinterpreted as phrase-final lengthening. Focus-marking strategies bring no additional evidence for the existence of stress, but they seem to be partly speaker- and tone-specific, which supports results obtained in studies of Northern Vietnamese (Michaud 2005).

Preaspirated voiceless stops, a well-documented feature of Scottish Gaelic (Ní Chasaide 1985, Clayton 2010, Nance & Stuart-Smith 2013), have also been reported in the English spoken in the Hebrides island chain (Borgstrøm 1940, Wells 1982, Shuken 1984). However, a detailed description of preaspiration in Hebrides English has previously been unavailable. This paper presents the results of a phonetic study of preaspirated voiceless stops in Hebrides English, based on the speech of 24 English–Scottish Gaelic bilinguals from nine regions within the Hebrides island chain. The paper describes the effect of linguistic features on the duration and frequency of preaspiration, including place of articulation, word position, and vowel context. The paper also considers the role of social factors, including speakers’ geographic origin, age, and gender, finding that preaspiration is more frequent among women and among older speakers, especially older female speakers from Lewis. The paper concludes that preaspiration is likely to be an obsolescent feature in Hebrides English, rather than an innovative feature as in other varieties of English such as Tyneside or Aberystwyth (Docherty & Foulkes 1999, Foulkes, Docherty & Watt 2001, Hejná 2015).

This study investigated acoustic properties of the four-way contrast in Russian voiceless sibilant fricatives (/ssj ʂ ʃj/). Words with these consonants, occurring in a variety of phonetic contexts, were elicited from 10 Russian native speakers. Measurements were made of duration, centre of gravity (COG) and intensity of fricative noise, as well as of formants F1–F3 during the following vowel. The results revealed that the anterior vs. posterior contrast was clearly distinguished by COG throughout the frication period, and to a lesser degree by noise intensity. The palatalized vs. non-palatalized contrast was distinguished by F1 and (especially) F2 at the onset, the midpoint, and, in some cases, at the offset of the following vowel. The four-way contrast was thus well categorized by a combination of COG and F2–F1 differences. Fricative duration only marginally distinguished /ʃj/, commonly described as geminate, from the other consonants. Clear durational differences, however, were observed for the same consonants in different positional and stress contexts. Overall, the results of the study provide a systematic documentation of the typologically uncommon fricative contrast, while also shedding light on some facts of synchronic patterning and historical development of the fricative system of Russian.

This study explores the glottalization of Taiwan Min checked tones 3 and 5 with a CV [ptk ʔ] syllable structure. Electroglottography (EGG) supplements acoustic data on disyllabic words with checked tones collected from 40 speakers from five dialect regions. The results indicated that a final coda can be realized as a full oral/glottal stop closure, an energy dip at vowel's end, an aperiodic voicing at vowel's end, or a coda deletion. Over 80% of /ʔ/ codas and less than 20% of /ptk/ codas were deleted. The undeleted /ptk/ codas were more likely to be produced with a full stop closure among tone 3 and sandhi tones. Glottal contact quotient (CQ_H) distinguished tones 3 and 5 from unchecked tones 31 and 51, respectively. In sandhi positions, the vowels of tone [5] /3/ were produced with a longer CQ_H, lower H1*-A3* and a higher Cepstral Peak Prominence (CPP), suggesting a longer close phase, a more abrupt glottal closure and more periodic voicing than tone [3] /5/. In juncture position, coda deletion and the merging of H1*-A1*, H1*-A3* and A1*-A2* of tones [3] /3/ and [5] /5/ suggest a sound change among checked tones.

Across languages, there is a tendency to avoid length contrasts in the most vowel-like consonant classes, such as glides or laryngeals. Such gaps could arise from the difficulty of determining where the boundary between vowel and consonant lies when the transition between them is gradual. This claim is tested in Persian (Farsi), which has length contrasts in all classes of consonants, including glides and laryngeals. Persian geminates were compared to singletons in three different speaking rates and seven different consonant classes. Geminates were found to have longer constriction intervals than singletons, and this length effect interacted with both speaking rate and manner of articulation. In one of two perception experiments, Persian speakers identified consonants as geminate or singleton in stimuli in which the constriction duration was systematically varied. The perceptual boundary between geminates and singletons was most sharply defined for obstruents and least so for laryngeals, as reflected by the breadth of the changeover region in the identification curve. In the other perception experiment, subjects identified the length class of glides differing in constriction duration and formant transition duration. Longer formant transitions led to more geminate responses and to a broader changeover interval.

The Tai dialect spoken in Cao Bằng province, Vietnam, is at an intermediate stage between tonal register split and the accompanying transphonologization of a voicing contrast into a dual-register tone system. While the initial sonorants have completely lost their historical voicing distinction and developed a six-way tonal contrast, the obstruent series still preserves the original voicing contrast, leaving the tonal split incomplete. This paper presents the first acoustic study of tones and onsets in Cao Bằng Tai. Although f0, VOT, and voice quality were all found to play a role in the system of laryngeal contrasts, the three speakers considered varied in terms of the patterns of acoustic cues used to distinguish between onset types, particularly the breathy voiced onset //. From the diachronic perspective, our findings may help to explain why the reflex of modal pre-voiced stops (*b) can be either aspirated or unaspirated voiceless stops.

About 35 million people around the world speak Ukrainian (Lewis, Simons & Fenning 2016). The largest populations of Ukrainian speakers outside Ukraine (more than 32 million speakers) are in Russia (c. 4.5 million), followed by Moldova (c. 0.6 million), Canada (c. 0.5 million) and the USA (c. 0.5 million). Smaller Ukrainian communities have also settled in some other countries including Kazakhstan, Belarus, Poland, Romania, Argentina, Brazil and Slovakia (Mokienko 2002). Ukrainian, alongside Russian and Belarusian, belongs to the East Slavonic languages within the Indo-European language family.

The Azerbaijani, Azerbaijanian or Azeri language belongs to the western group of the southwestern, or Oghuz, branch of the Turkic language family and is mainly spoken in Azerbaijan and Iran. Azerbaijani is the official language of the Republic of Azerbaijan and over 80% of its population use it as their first language (Johanson 2010). Among non-Persian languages in Iran, Azerbaijani, with approximately 15–20 million native speakers, has the largest number of speakers (Crystal 2010). In total, more than 50 million people speak Azerbaijani (Khalilzadeh 2013).

The Nuosu (Nosu) Yi language, or Northern Yi (北部彝语), is spoken by approximately two million people in southern Sichuan Province and northern Yunnan Province, China, the majority of whom are monolingual. Yi is a member of the Yi Branch of the Lolo-Burmese subgroup of the Tibeto-Burman family (Benedict 1972/2009, Bradley 1979), which includes some 50 languages, also called the Nisoic languages (Lama 2012) or Ngwi Group. The large (5 million) ethnic Yi nationality groups of Yunnan Province are distantly related. The third author, Lama Ziwo, who was 31 at the time of recording, produced, translated and transcribed the recorded audio data phonemically and participated in the laryngoscopic filming of the video data. He is a native speaker of the Suondip/Suondi dialect, and a fluent speaker of the Shypnra/Shengza dialect. It is the Shypnra/Shengza standard dialect that is being represented in this paper. The most distinguishing phonetic feature of Northern Yi is its systematic vocal register contrast (Matisoff 1972, Dai 1990) between two settings of the laryngeal constrictor mechanism, which are referred to as a lax (unconstricted) series and a tense (constricted) series (Edmondson et al. 2000, 2001). The contrast is realized as a distinction in resonance (spectral quality) rather than as contrasting phonation types as in some other forms of Yi or in other Tibeto-Burman languages (e.g. Bai). The consonantal inventory is large, with complex vocalic interactions, including interactions with two pairs of fricativized vowels. Northern Yi has 43 initial consonants, five pairs of vowels (or syllable rhymes), and three tones: 55, 33, and 21. Relevant reports on voice quality in related languages can be found in Maddieson & Ladefoged (1985) and Sun & Liu (1986).

Sorbian is a West Slavic language spoken in eastern Germany, in Saxony and Brandenburg near the borders of Poland and the Czech Republic, and is recognized as an endangered language by UNESCO (Moseley 2012). It is commonly referred to as Sorbian in English, but has historically been referred to as both Wendish and Lusatian. The Sorbian speech area used to expand from its northernmost point approximately 50 km south-east of Berlin to its southernmost point approximately 8 km from the borders of the Czech Republic (Stone 1993). This area is also referred to as Lusatia (Figure 1). However, the Sorbian-speaking area continues to shrink every year and is currently much smaller than Stone (1993) describes. Upper Sorbian is currently only used in daily communication in and immediately around Budyšin (personal communication, Lechosław Jocz).

Munji (aka Munjani or Munjiwar; ISO 639-3: [mnj]) is spoken in the Kuran wa Munjan district of Badakhshan province in Afghanistan. Munji is classified as an Indo-European, Indo-Iranian, Iranian, Eastern, Southeastern, Pamir language (Lewis 2009). There are about 5,300 Munji speakers (Beyer & Beck 2011). There are two main dialects, which divide into the northern and southern halves of the valley (see Figure 1). These dialects exhibit some regular sound changes and a small percentage of lexical differences. Munji speakers are aware of the differences, but there is no trouble in mutual understanding.

Khowar (ISO 639-3: khw) is an Indo-Aryan language spoken by 200,000–300,000 (Decker 1992: 31–32; Bashir 2003: 843) people in Pakistan's Khyber Pakhtunkhwa Province (formerly North-West Frontier Province). The majority of the speakers are found in Chitral (a district and erstwhile princely state bordering Afghanistan, see Figure 1), where the language is used as a lingua franca, but there are also important pockets of speaker groups in adjacent areas of Gilgit-Baltistan and Swat District as well as a considerable number of recent migrants to larger cities such as Peshawar and Rawalpindi (Decker 1992: 25–26). Its closest linguistic relative is Kalasha, a much smaller language spoken in a few villages in southern Chitral (Morgenstierne 1961: 138; Strand 1973: 302, 2001: 252). While Khowar has preserved a number of features (phonological, morphological as well as lexical) now lost in other Indo-Aryan languages of the surrounding Hindukush-Karakoram mountain region, it has, over time, incorporated a massive amount of lexical material from neighbouring or influential Iranian languages (Morgenstierne 1936) – and with it, new phonological distinctions. Certain features might also be attributable to formerly dominant languages (e.g. Turkic), or to linguistic substrates, either in the form of, or related to, the language isolate Burushaski, or other, now extinct, languages previously spoken in the area (Morgenstierne 1932: 48, 1947: 6; Bashir 2007: 208–214). There is relatively little dialectal variation among the speakers in Chitral itself, probably attributable to the relative recency of the present expansion of the language (Morgenstierne 1932: 50).

Brunei Malay (ISO 639-3: kxd) is spoken in the Sultanate of Brunei Darussalam and also in some nearby places in East Malaysia such as Miri and Limbang in Sarawak (Asmah 2008: 65), on the island of Labuan (Jaludin 2003: 35) and around Beaufort in western Sabah (Saidatul 2003). Of the population of about 400,000 in Brunei, about two-thirds are native speakers of Brunei Malay (Clynes 2001), and the language is generally used as a lingua franca between the other ethnic groups (Martin 1996), so even most Chinese Bruneians, numbering about 45,000 (Dunseath 1996), are reasonably proficient in Brunei Malay. Although Standard Malay is promoted as the national language of Brunei (Clynes & Deterding 2011), in fact it is only used in formal situations, such as government speeches and television and radio broadcasts (Martin 1996). The language that is spoken most extensively is Brunei Malay, though English is also widely used by the educated elite (Deterding & Salbrina 2013).

Malayalam ( /malajaːɭam/; ISO 639) is a Dravidian language (Southern branch) spoken by over 33 million people in India, predominantly in Kerala (Lewis, Simmons & Fenning 2013). The language is diglossic, with the formal register used in written media and orally in formal settings. Colloquial Malayalam, for which there is no standard orthography, varies by region and social community (Asher & Kumari 1997). The speech illustrated below is representative of the variety spoken by the Namboodiri subcaste of Brahmins in and around Kochi, a city in central Kerala. The Namboodiri subcaste was traditionally a land-owning priestly class, and until relatively recently, the community was very insular. Consequently, the dialect differed from standard Malayalam as it is spoken today; this is discussed in some detail in U. Namboodiripad (1989, personal communication).