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All Italian consonants affected by gemination, that is affricates, fricatives, liquids, nasals, and stops, were analyzed within a project named GEMMA that lasted over a span of about 25 years. Results of the analysis on stops, as published in (Esposito, A., and Di Benedetto, M. G. (1999). “Acoustic and Perceptual Study of Gemination in Italian Stops,” The Journal of the Acoustical Society of America, ASA, Vol. 30, pp. 175-185) showed that the main acoustic cue to gemination in Italian was closure duration, while frequency and energy domain parameters were not significantly affected by gemination. This paper - the first of a set of two covering all remaining consonants - addresses nasals and liquids; its companion paper addresses affricates and fricatives. Results on nasals and liquids confirm the findings on stops, in particular that the primary acoustic cue to gemination in Italian is durational in nature and corresponds to a lengthened consonant duration. Results also show an inverse correlation between consonant and pre-consonant vowel durations which is, however, also present when considering singleton vs. geminate word sets separately, indicating a sort of duration compensation between these segments to eventually preserve rhythmical structures; this inverse correlation is reinforced when considering singleton and geminate sets combined. Classification tests of singleton vs. geminate consonants show that, for both nasals and liquids, best classification scores are obtained when consonant duration is used as a classification parameter. Although slightly less performing, the ratio between consonant and pre-consonant vowel durations is also a potential good candidate for automatic classification of geminate vs singleton nasals and liquids in Italian.

The carotid artery consists of two carotid arteries, namely the dextra communist artery and the sinistra, the main blood vessels in the neck that supply blood to the brain, the basal ganglia, which have the function of regulating the motor functions of the body. The communal carotid arteries blocked flow can cause brain ischemia. It is due to hypoxia due to a lack of oxygen supply carried by the brain, resulting in motor body function disorders, incredible blockages in the carotid arteries that supply blood to the brain, and neurons as regulators of motor functions. The research is a literature study that has relevance to the formulation of the problem meets the criteria and research objectives to determine the effect of the length of the blockage of the arteries of the carotid artery of the communist to the motor function of the Wistar strain rats. The results of a literature review or literature studies in some previous scientific research journals indicate if the blockage of the arteries of the communal carotid arteries affects the disruption of motor function caused by hypoxia and damage to neurons and brain tissue in motor neurons. The conclusion is that the blockage and the duration of blockage of the communal carotid arteries affect motor function.

Introduction: Children with cleft palate exhibit differences in the 4 temporal components of nasalization (nasal onset and offset intervals, nasal consonant duration, and total speech duration), with various patterns having been noted based on different languages. Thus, the current study aimed to examine the temporal aspects of velopharyngeal closure in children with and without cleft palate; this is the first study to do so in the Turkish language. Methods: This study evaluated and compared the 4 temporal characteristics of velopharyngeal closure in children (aged 6–10 years) with (n = 28) and without (n = 28) cleft palate using nonword consonant and vowel speech samples, including the bilabial nasal-to-stop combination /mp/ and the velar nasal-to-stop combination /ηk/. Acoustic data were recorded using a nasometer, after which acoustic waveforms were examined to determine the 4 temporal components of nasalization. Flexible nasoendoscopy was then used to evaluate velopharyngeal closure patterns. Results: With regard to the 4 closure patterns, significant differences in the nasal offset interval (F4–25 = 10.213, p = 0.04; p < 0.05) and the nasal consonant duration ratio (F4–25 = 12.987, p = 0.02; p < 0.05) were observed for only /ampa/. The coronal closure pattern showed the longest closure duration (0.74 s). Children with cleft palate showed prolonged temporal parameters in all 4 characteristics, reflecting oral-nasal resonance imbalances. In particular, the low vowel sound /a/ was significantly more prolonged than the high vowel sounds /i/ and /u/. Conclusions: The examined temporal parameters offer more accurate characterizations of velopharygeal closure, thereby allowing more accurate clinical assessments and more appropriate treatment procedures. Children with cleft palate showed longer nasalization durations compared to those without the same. Thus, the degree of hypernasality in children with cleft palate may affect the temporal aspects of nasalization.

Purpose Safe swallowing requires adequate protection of the airway to prevent swallowed materials from entering the trachea or lungs (i.e., aspiration). Laryngeal vestibule closure (LVC) is the first line of defense against swallowed materials entering the airway. Absent LVC or mistimed/shortened closure duration can lead to aspiration, adverse medical consequences, and even death. LVC mechanisms can be judged commonly through the videofluoroscopic swallowing study; however, this type of instrumentation exposes patients to radiation and is not available or acceptable to all patients. There is growing interest in noninvasive methods to assess/monitor swallow physiology. In this study, we hypothesized that our noninvasive sensor-based system, which has been shown to accurately track hyoid displacement and upper esophageal sphincter opening duration during swallowing, could predict laryngeal vestibule status, including the onset of LVC and the onset of laryngeal vestibule reopening, in real time and estimate the closure duration with a comparable degree of accuracy as trained human raters. Method The sensor-based system used in this study is high-resolution cervical auscultation (HRCA). Advanced machine learning techniques enable HRCA signal analysis through feature extraction and complex algorithms. A deep learning model was developed with a data set of 588 swallows from 120 patients with suspected dysphagia and further tested on 45 swallows from 16 healthy participants. Results The new technique achieved an overall mean accuracy of 74.90% and 75.48% for the two data sets, respectively, in distinguishing LVC status. Closure duration ratios between automated and gold-standard human judgment of LVC duration were 1.13 for the patient data set and 0.93 for the healthy participant data set. Conclusions This study found that HRCA signal analysis using advanced machine learning techniques can effectively predict laryngeal vestibule status (closure or opening) and further estimate LVC duration. HRCA is potentially a noninvasive tool to estimate LVC duration for diagnostic and biofeedback purposes without X-ray imaging.

Voicing contrasts are lexically important for differentiating words in many languages (e.g., "bear" vs "pear"). Temporal differences in the voice onset time (VOT) and closure duration (CD) contribute to the voicing contrast in word-onset position. However, little is known about the acoustic realization of these voicing contrasts in Australian English-speaking children. This is essential for understanding the challenges faced by those with language delay. Therefore, the present study examined the VOT and CD values for word-initial stops as produced by 20 Australian English-speaking 4-5-year-olds. As anticipated, these children produced a systematic distinction between voiced and voiceless stops at all places of articulation (PoAs). However, although the children's VOT values for voiced stops were similar to those of adults, their VOTs for voiceless stops were longer. Like adults, the children also had different CD values for voiced and voiceless categories; however, these were systematically longer than those of adults. Even after adjusting for temporal differences by computing proportional ratios for the VOT and CD, children's voicing contrasts were not yet adultlike. These results suggest that children of this age are still developing appropriate timing and articulatory adjustments for voicing contrasts in the word-initial position.

This study performed a comparative analysis of changes in the operating status of initial surviving disaster-stricken businesses and non-disaster-stricken businesses in Lushan County, China, after a devastating earthquake on 20 April 2013. It used a logistic regression model to explore the key factors associated with 'post-disaster continued business operation' in the long term. Field data were collected from 1,078 businesses and questionnaire data from 263 small businesses between 2013 and 2017. The results indicate that a higher proportion of initial surviving disaster-stricken businesses than non-disaster-stricken businesses managed to remain operational in each observation period. The continued operation of disaster-stricken businesses after the earthquake was positively associated with the owner's age, previous disaster experience, pre-disaster financial conditions, closure duration, and borrowing money from family or friends. A negative association was found with the size of the business. The findings serve as a vital reference for strategies to promote post-disaster continued business operation.

Introduction: The broad aim of this study was to compare the safety and efficacy of using barbed sutures and running closure versus interrupted placement of standard of care sutures for closure of the arthrotomy during total hip arthroplasty (THA). Specifically, we compared duration of arthrotomy closure, the number of sutures utilised for arthrotomy closure, and 90-day outcomes including wound-related readmission, reoperation, and complications. Methods: A total of 60 patients undergoing 60 THAs were enrolled in a prospective, single-blinded trial and randomised to receive either running closure of the arthrotomy with barbed sutures ( n = 30) or interrupted closure with standard of care sutures ( n = 30). Patients were eligible if they were undergoing primary THA for osteoarthritis and excluded if they had a BMI > 45 kg/m2 or age > 80 years or Results: Arthrotomy closure duration was significantly shorter in the barbed suture group (3 minutes ± 9 seconds) versus the standard of care group (8 minutes ± 26 seconds, p < 0.001). The suture utilisation for arthrotomy closure was 1 suture in the barbed sutured group 28/30 (93%) patients versus 2–4 sutures in 27/30 (90%) in the standard of care group ( p < 0.001). The overall number of wound-related complications in the barbed suture group was 1/30 (3%) versus 1/30 (3%) in the standard of care group ( p = 1.00). The rate of suture abscesses was 1/30 (3%) in barbed suture group versus the standard of care ( p = 1.00). There was trochanter bursitis 1/30 (3%) in the standard of care group versus zero in the barbed suture group ( p = 1.00). Conclusions: These results suggest that barbed suture utilisation may be faster and more resource efficient than use of standard of care sutures for arthrotomy closure in THA. ClinicalTrials.gov Identifier: NCT03285555

Objectives: The benefits of Cochlear Implant (CI) in improving speech production abilities in children with hearing impairment can be reflected through acoustic analysis. The primary aim of the stu...

Background/Aims:This work examines the perception of the stop voicing contrast in Spanish and English along four acoustic dimensions, comparing monolingual and bilingual listeners. Our primary goals are to test the extent to which cue-weighting strategies are language-specific in monolinguals, and whether this language specificity extends to bilingual listeners.Methods:Participants categorized sounds varying in voice onset time (VOT, the primary cue to the contrast) and three secondary cues: fundamental frequency at vowel onset, first formant (F1) onset frequency, and stop closure duration. Listeners heard acoustically identical target stimuli, within language-specific carrier phrases, in English and Spanish modes.Results:While all listener groups used all cues, monolingual English listeners relied more on F1, and less on closure duration, than monolingual Spanish listeners, indicating language specificity in cue use. Early bilingual listeners used the three secondary cues similarly in English and Spanish, despite showing language-specific VOT boundaries.Conclusion:While our findings reinforce previous work demonstrating language-specific phonetic representations in bilinguals in terms of VOT boundary, they suggest that this specificity may not extend straightforwardly to cue-weighting strategies.

Modern cars have focused on road safety by guaranteeing driver, pedestrians, and other traffic object safety. Advanced driver assistance systems are a set of intelligent systems that support the driver by providing more information about the surrounding environment. The fatigue detection system is an intelligent system that detects the driver's face and gauges the driver's tiredness state. Such a system can prevent accidents by stropping the car if the driver is drowsy. In this paper, we propose a driver fatigue detection based on object detection model fatigue indicators. The efficientDet model was used to detect the state of the eye and mouth states then the eyes' closure duration/Percentage of eye closure (PERCLOS) and yawning frequency/frequency of mouth (FOM) were used to judge fatigue state. The efficientDet is a lightweight object detection model with high performance. The proposed approach was evaluated on the National Tsing Hua University Driver Drowsiness Detection (NTHU-DDD) dataset. The proposed approach has achieved an accuracy of 96.05% and real-time processing. The reported results show the efficiency of the proposed model for driver fatigue detection.

Laryngeal vestibule (LV) closure is a critical physiologic event during swallowing, since it is the first line of defense against food bolus entering the airway. Identifying the laryngeal vestibule status, including closure, reopening and closure duration, provides indispensable references for assessing the risk of dysphagia and neuromuscular function. However, commonly used radiographic examinations, known as videofluoroscopy swallowing studies, are highly constrained by their radiation exposure and cost. Here, we introduce a non-invasive sensor-based system, that acquires high-resolution cervical auscultation signals from neck and accommodates advanced deep learning techniques for the detection of LV behaviors. The deep learning algorithm, which combined convolutional and recurrent neural networks, was developed with a dataset of 588 swallows from 120 patients with suspected dysphagia and further clinically tested on 45 samples from 16 healthy participants. For classifying the LV closure and opening statuses, our method achieved 78.94% and 74.89% accuracies for these two datasets, suggesting the feasibility of implementing sensor signals for LV prediction without traditional videofluoroscopy screening methods. The sensor supported system offers a broadly applicable computational approach for clinical diagnosis and biofeedback purposes in patients with swallowing disorders without the use of radiographic examination.

Background: This study aims to compare robot-assisted lobectomy versus completely portal robotic lobectomy. Methods: Between January 2014 and December 2019, a total of 41 patients (10 males, 31 females; median age 62 years; range, 50 to 68 years) underwent robotic anatomical pulmonary resection in our institution were retrospectively analyzed. The patients were consecutively divided into two groups: the first 20 (48.8%) patients underwent pulmonary resection by robot-assisted lobectomy technique, while the next 21 (51.2%) patients underwent pulmonary resection by completely portal robotic lobectomy with four arms. Data including age, sex, diagnosis, surgery type and duration, rate of conversion to open surgery, and length of stay of the patients were recorded. The operation time, docking time, console time, and closure duration for each patient were also noted. Results: There was no statistically significant difference in age, sex, comorbidities, complications, length of hospital stay, adequate lymph node staging, or tumor size and side between the two groups (p>0.05). However, the mean console and operation times were statistically significantly shorter in the patients receiving completely portal robotic lobectomy with four arms (p=0.001). Conclusion: The advantage of completely portal robotic lobectomy with four arms is relative, although it significantly shortens the operation time. Based on our experiences, this technique may be preferred in case of inadequate lung deflation, as carbon dioxide insufflation allows sufficient workspace for robotic lung resection.

Sociophonetic literature investigating consonantal variation in American English has revealed that the production of voiced stop closures in the intersonorant position differs systematically by region. This indicates that sociocultural factors may influence the phonetic realization of voiced stops. The current study examines whether the implementation of closure voicing in running speech by older children is affected by regional variation. Acoustic measurements included stop closure duration and closure voicing duration (absolute and proportional) obtained from read sentences. The prosodic prominence of the target word was varied, introducing an additional source of variation. Our sample included 48 girls and 36 women, each representing one of three US dialect regions: Midland, North, or South. We analyzed a total of 3,524 tokens. As predicted, children produced stops with less consistency than adults. Children’s comparatively longer durations and greater variability—especially as a feature of lexical stress—are indicative of their more effortful productions and developing mastery of lexical stress contrastivity. Significant interactions between dialect and age group showed that children from the South dialect region deviated from their adult counterparts and implemented voicing akin to their peers from the Midland and North.

Enhancing the productivity of the national railway systems is now one of the main concerns of transportation authorities in Iran. In this regard, one of the strategies devised by Iran's Railway Company is to increase the robustness of the system against incidents. The paper describes the state of the network and discusses that human errors are the main cause imposing significant costs. This is followed by the development of a method for the network vulnerability analysis of sparse interurban rail networks considering transportation of various goods as well as passengers. The paper examines the effects of an incident where consequent effects are substantial and propagate functionally throughout the network, to take the network closure duration into account, and to tie together both additional costs of transporting passengers/goods (due to prolongation of routes) and unsatisfied demand. The purpose is to find the most important links of the network, where failure results in serious consequences. Passenger unsatisfied demand, freight unsatisfied demand, and monetary costs are considered as the consequences of network disruptions, and a multi-objective optimization programming approach is designed to generate solutions based on these criteria.

The acquisition of Italian stop consonants by Mandarin Chinese-speaking learners has hardly been investigated. This study was designed to fill this gap. To investigate Chinese learners’ acquisition patterns of Italian voiced and voiceless stops, a perception experiment and a production experiment were conducted. Twenty Mandarin Chinese-speaking undergraduate students majoring in Italian, five native Italian and five native Mandarin speakers served as participants in the perception experiment; and an equal number of participants with the same language backgrounds served as participants in the production experiment. In the perception experiment, the participants had to identify the stimuli in three continua (i.e. bilabial, alveolar and velar) where voice onset time (VOT) values ranged from −50 ms to 90 ms in 10 ms steps. In the production experiment, data were collected from a reading task in which the participants were asked to read the target words with word-initial stops in carrier-sentences; the VOT and closure durations were measured. The results show that, in perception, Chinese learners have difficulty differentiating between Italian voiced and voiceless stops; in production, Italian voiced rather than voiceless stops represent a challenge for Chinese learners. The results are in line with the predictions made by the Perceptual Assimilation Model-L2 (PAM-L2) and the Speech Learning Model (SLM), as well as with most other studies focusing on the acquisition of stops of ‘true-voice languages’ by Chinese learners.

This study investigated L1 interference in the perception of released word-final stops in English by performing perception experiments on Korean and English listeners. Stimuli with conflicting cues were used in experiments in which the ‘long CV’ and the ‘short vowel CV’ were rejoined with six silent closure duration intervals and two release bursts of [g] and two release bursts of [k]. The perception results show that Korean listeners perceived significantly more [k] compared to English listeners when ‘k’ release was attached to a ‘long CV.’ We suggest that this is due to different phonological systems in Korean and English. In Korean, a released stop occurs only in the onset position in which the VOT and the stop closure duration are important acoustic cues for the identity of a stop. Thus, the English coda [k] with voiceless release burst could be perceived as an onset with long VOT, namely [k], by Korean listeners. In contrast, English listeners mostly perceived a voiced stop due to the long preceding vowel (cf. Raphael, 1972). With the stimuli of ‘short CV’ with ‘g’ release, Korean listeners perceived significantly more [g] than NE listeners did. English coda [g] with a voiced release may be perceived as an onset [g] with a short VOT by Korean listeners. In contrast, English listeners perceived a voiceless stop [k] due to the preceding short vowel. This paper also showed that Korean listeners would perceive finer distinctions than two levels of release, ‘g’ release and ‘k’ release.

Standard German distinguishes voiced (short-lag) and voiceless (long-lag) stops in domain-initial and -medial position with VOT being the most important cue. This phonemic distinction has been neutralized in many dialects but the merger appears to have been reversed in the corresponding regional accents probably due to the increasing influence of the standard language. This apparent-time study investigates the emerging importance of VOT and VCratio (a combined measure of proportional vowel and closure duration) in Bavarian and Saxon, two German regional varieties prone to reverse the merger. To this end we analyzed acoustically minimal pairs with stops in medial and initial position and investigated the integrated effects of VOT and VCratio in perception. VOT is becoming more important in younger speakers and dialectal traces are more pronounced in older participants. While a trading relation between VOT and VCratio was present in the perception of all groups it has only emerged in younger Bavarians' production (possibly reinforced by a greater amount of schwa deletion in this group). The findings are discussed within a usage-based model.

The aim of this study was to assess pharyngeal swallowing impairments in thyroidectomy patients and to delineate the contributory kinematic components. Forty consecutive patients (mean age = 47.33 years) and fourteen age- and sex-matched heathy adult volunteers (mean age = 42.64 years) participated in this study. A videofluoroscopic swallowing study (VFSS) was performed 1 day prior to surgery, and at 1 week and 3 months post-surgery. VFSS images were evaluated using the Modified Barium Swallowing Impairment Profile (MBSImp). Kinematic and temporal aspects of swallowing were characterized by measurement of maximum hyoid and laryngeal excursion, pharyngeal transit duration, laryngeal response duration (LRD), and laryngeal closure duration at each three time-points. At 1 week post-surgery, only pharyngeal impairment was significantly deteriorated than pre-surgery (p = 0.001). However, at 3 months, a significant improvement was observed to pre-surgery level (p = 0.01). Post-surgery, maximum hyoid excursion was significantly reduced in patients compared controls (p = 0.001). Although the maximal distance of the hyoid and the laryngeal excursion was shorter than before surgery, laryngeal excursion at all three time-points was similar to that of controls. At all three time-points, LRD was significantly longer in patients than in controls (p = 0.01). Following thyroidectomy, pharyngeal aspects of swallowing as measured by the MBSImp and kinematic aspects of swallowing were reduced with incomplete recovery at 3 months. These exploratory data may guide decision regarding management of pharyngeal swallowing impairment with patients undergoing total thyroidectomy.

This study investigates the correlation between the proficiency of L2 learners of English and the degree of L1 Korean intervocalic voicing rule transfer on the English intervocalic voiceless stop production by Korean English learners. Korean has a phonological rule that voiceless stops become voiced between vowels (Korean intervocalic voicing rule) but this rule does not apply in English. The aforementioned difference between the phonological rule of the two languages makes it possible to predict that Korean learners with lower L2 proficiency might produce English intervocalic voiceless stops with higher degree of voicing than the learners with higher L2 proficiency. The speech data of Korean L2 learners of English is extracted from GenieSpeeCor, rated and categorized English speech corpus of Korean L2 learners of English production, and the value of intensity drop and closure duration were used as acoustic cues for voicing difference. Alveolar stop is excluded from the data analysis because the flapped /t/ sound is difficult to distinguish from the voiced sound. As a result of the current study, when it comes to the closure duration as an acoustic cue, there was no meaningful statistical relation between learners' L2 proficiency and the degree of intervocalic stops voicing. However, in terms of the intensity drop learners with the highest L2 proficiency showed a lower degree of voicing than the learners with middle and lowest proficiency.This study investigates the correlation between the proficiency of L2 learners of English and the degree of L1 Korean intervocalic voicing rule transfer on the English intervocalic voiceless stop production by Korean English learners. Korean has a phonological rule that voiceless stops become voiced between vowels (Korean intervocalic voicing rule) but this rule does not apply in English. The aforementioned difference between the phonological rule of the two languages makes it possible to predict that Korean learners with lower L2 proficiency might produce English intervocalic voiceless stops with higher degree of voicing than the learners with higher L2 proficiency. The speech data of Korean L2 learners of English is extracted from GenieSpeeCor, rated and categorized English speech corpus of Korean L2 learners of English production, and the value of intensity drop and closure duration were used as acoustic cues for voicing difference. Alveolar stop is excluded from the data analysis because the flapped /...

The impacts of crises are never gender-neutral, and the COVID-19 pandemic is no exception. Using a brand-new dataset covering 24 countries, we document that women-led businesses are subject to a higher likelihood of closure and a longer closure duration than men-led businesses during the pandemic. Women business leaders are also more pessimistic about the future than men business leaders. The disadvantages suffered by women-led businesses widen in high gender inequality economies and developing economies. Our results further indicate that finance and labor factors are likely to be the major contributors to these disadvantages. We suggest that COVID-19′s policy response should not be gender-neutral.

Objectives Patients with bilateral vocal fold paralysis (BVFP) theoretically have difficulty producing voiceless consonants. However, perceptual studies have revealed clear production of voiceless consonants with good articulation scores in nontracheostomized patients. The purpose of this study was to clarify the production of voiceless stops during articulation in patients with BVFP compared to normal speakers. Methods The perceptual, acoustic, and aerodynamic characteristics of patients with BVFP and those with normal speech were investigated with special reference to voiceless stop consonants. Test words were prepared to place the stop consonants in different phonological environments, and were all nonsense words. Results The patients with BVFP perceptually produced the three types of stops successfully. However, they acoustically varied voice onset time to produce phonetically representative stops but decreased voice onset time of /ph/ and /p/ compared to those of normal speakers. These patients may properly control air pressure to produce the three types of stop consonants similar to normal speakers. Conclusion The patients with BVFP realized the distinctions between the three types of stops similar to the normal speakers. Although vocal mobility was absent in the patients with BVFP, voice onset time, vowel duration, closure duration, and air pressure were similar to those of normal speakers.

A large proportion of estuaries along microtidal wave-dominated coastlines worldwide have entrances that intermittently close to the ocean when tidal currents and fluvial discharge are insufficient to erode sediment delivered onshore by waves. In this study, these systems are termed “intermittently open/closed estuaries” (IOCE) in order to include all estuaries which intermittently close to the ocean. IOCE do not fit neatly into existing generalized estuary classification models and have been traditionally recognized as a single estuary type that constitute a rare subset of wave-dominated estuaries. In this study, 111 estuaries in Victoria, Australia, are used to develop a classification model that delineates between different IOCE types. This was undertaken using historic aerial imagery and quantification of the estuary channel width, catchment area, lagoon dimensions and tidal prism derived from remotely sensed data. Field surveying of entrance morphology was undertaken for a subsample of 35 IOCE characteristic of each section of the coast and which had detailed entrance condition records. Using this subset, IOCE were classified into three distinct types using multiple methods of statistical delineation (non-metric multidimensional scaling, hierarchical cluster analysis and distribution analysis). These three types are: (1) Type A, the largest IOCE which both close and open infrequently but for the longest durations; (2) Type B, medium sized IOCE which open and close several times per year for weekly to monthly durations; and (3) Type C (tidal creeks), the smallest IOCE located specifically in high rainfall, mountainous catchments and which exist in a predominantly open state. The three types of IOCE showed an order of magnitude difference in entrance closure duration as controlled by variations in the catchment area, tidal prism volume, dimensions of the estuarine lagoon and the entrance channel at the mouth. The classification is also applicable to wave-dominated coastlines internationally where IOCE are present.

This paper investigates acoustic features correlated with voicing (VOT, stop duration, closure duration, release duration, voicing into closure duration, duration of preceding vowel and duration of following vowel) and with the place of articulation (spectral peaks) of stop consonants /p, b, t, d, k, g/. A corpus with these stops in initial, medial and final word position was recorded for six native speakers of European Portuguese.