Voice quality of cellular mobile phones

2002 ◽  
Author(s):  
H.M. Karkhanechi ◽  
M.A. Soderstrand
Keyword(s):  
Mobile Phones ◽  
Voice Quality ◽  
Cellular Mobile

scholarly journals Challenges to Data Collection: Digital Divide Causing Double Marginalization of the Bagri Community in Sindh, Pakistan

2021 ◽  
Vol 11 (2) ◽  
pp. 24-34
Author(s):  
Ameer Ali ◽  
Maya Khemlani David
Keyword(s):  
Qualitative Research ◽  
Data Collection ◽  
Digital Divide ◽  
Mobile Phones ◽  
Digital Literacy ◽  
Voice Quality ◽  
Difficult Situation ◽  
Social Challenges ◽  
Sindh Province

In the wake of the Covid-19 pandemic, we conducted qualitative research on the Bagri community in Pakistan’s Sindh province. The Bagri community is considered an indigenous community in Pakistan’s Sindh and Punjab provinces. They also live in some states in India. The community has been referred to as ‘scheduled caste’ in Pakistan’s constitution. They speak Bagri language and practice Hinduism. Unfortunately, some Hindus and Muslims discriminate against the Bagri community and give them a wide berth and the community is seen as untouchable (Shah, 2007). Due to lockdowns caused by Covid 19, it has become difficult to access members of the community in order to collect data. Many of the members of the community have no digital literacy and the few who had mobile phones were contacted through mobile phone, but unfortunately voice quality of the interviews was not good and there was either network or noisy interruptions which made it difficult to understand what the interviewee was saying. Given this difficult situation, we used the strategy of using a friend of a friend to conduct the interviews on our behalf. However, even this solution faced challenges as the community was perceived as untouchable. In this way, the Bagri community was not only socially but also digitally marginalized. Therefore, this qualitative research will explore the digital and social challenges coresearchers faced during data collection, and we discuss how these challenges, were to some extent, surmounted.

scholarly journals A Randomized Controlled Trial of Two Semi-Occluded Vocal Tract Voice Therapy Protocols

2015 ◽  
Vol 58 (3) ◽  
pp. 535-549 ◽  
Author(s):  
Mara R. Kapsner-Smith ◽  
Eric J. Hunter ◽  
Kimberly Kirkham ◽  
Karin Cox ◽  
Ingo R. Titze
Keyword(s):  
Quality Of Life ◽  
Vocal Tract ◽  
Controlled Trial ◽  
Voice Quality ◽  
Voice Handicap Index ◽  
Voice Therapy ◽  
Control Group ◽  
Perceptual Evaluation ◽  
Therapy Program

PurposeAlthough there is a long history of use of semi-occluded vocal tract gestures in voice therapy, including phonation through thin tubes or straws, the efficacy of phonation through tubes has not been established. This study compares results from a therapy program on the basis of phonation through a flow-resistant tube (FRT) with Vocal Function Exercises (VFE), an established set of exercises that utilize oral semi-occlusions.MethodTwenty subjects (16 women, 4 men) with dysphonia and/or vocal fatigue were randomly assigned to 1 of 4 treatment conditions: (a) immediate FRT therapy, (b) immediate VFE therapy, (c) delayed FRT therapy, or (d) delayed VFE therapy. Subjects receiving delayed therapy served as a no-treatment control group.ResultsVoice Handicap Index (Jacobson et al., 1997) scores showed significant improvement for both treatment groups relative to the no-treatment group. Comparison of the effect sizes suggests FRT therapy is noninferior to VFE in terms of reduction in Voice Handicap Index scores. Significant reductions in Roughness on the Consensus Auditory-Perceptual Evaluation of Voice (Kempster, Gerratt, Verdolini Abbott, Barkmeier-Kraemer, & Hillman, 2009) were found for the FRT subjects, with no other significant voice quality findings.ConclusionsVFE and FRT therapy may improve voice quality of life in some individuals with dysphonia. FRT therapy was noninferior to VFE in improving voice quality of life in this study.

Interaction of Speech Coders and Atypical Speech II

2002 ◽  
Vol 45 (4) ◽  
pp. 689-699 ◽  
Author(s):  
Donald G. Jamieson ◽  
Vijay Parsa ◽  
Moneca C. Price ◽  
James Till
Keyword(s):  
Communication Systems ◽  
Speech Rate ◽  
Voice Quality ◽  
Voice Disorders ◽  
Normal Hearing ◽  
Speech Quality ◽  
Degraded Speech ◽  
Before And After ◽  
Subband Processing

We investigated how standard speech coders, currently used in modern communication systems, affect the quality of the speech of persons who have common speech and voice disorders. Three standardized speech coders (GSM 6.10 RPELTP, FS1016 CELP, and FS1015 LPC) and two speech coders based on subband processing were evaluated for their performance. Coder effects were assessed by measuring the quality of speech samples both before and after processing by the speech coders. Speech quality was rated by 10 listeners with normal hearing on 28 different scales representing pitch and loudness changes, speech rate, laryngeal and resonatory dysfunction, and coder-induced distortions. Results showed that (a) nine scale items were consistently and reliably rated by the listeners; (b) all coders degraded speech quality on these nine scales, with the GSM and CELP coders providing the better quality speech; and (c) interactions between coders and individual voices did occur on several voice quality scales.

scholarly journals Optimal Transmit Volume Conditions for Mission Critical Voice Quality of Experience Measurement Systems

2021 ◽  
Author(s):  
Chelsea Greene ◽  
Jesse Frey ◽  
William Magrogan ◽  
Cara O’Malley ◽  
Jaden Pieper
Keyword(s):  
Quality Of Experience ◽  
Voice Quality ◽  
Measurement Systems ◽  
Mission Critical

scholarly journals The voice quality of sports coaches

Logopedija ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Anđela Bučević ◽  
Ana Bonetti ◽  
Luka Bonetti
Keyword(s):  
Voice Quality ◽  
Training Session ◽  
Acoustic Method ◽  
Male And Female ◽  
Significant Difference ◽  
Before And After ◽  
Sports Coaches ◽  
The Voice ◽  
Female Coaches

The aim of this research paper was to examine the voice quality of sports coaches using the objective (acoustic) method. A total of 28 sports coaches (mean age 28.58, SD=5.08), from the City of Zagreb participated in this research. Recordings of the phonation of the vowel /a/ before and after one training session were obtained and analyzed using the PRAAT Program. Mean, minimal and maximal values of fundamental frequency, shimmer, jitter and harmonics-to-noise ratio were observed. The statistical analyses showed no statistically significant difference in acoustic voice quality of male and female coaches before and after the training session, or between male and female coaches. However, intra-individual differences among participants were observed, which may be significant in terms of their potential to affect the quality of their voices in the future.

scholarly journals COMPARISON BETWEEN STANDARD AND MOBILE DENTAL PHOTOGRAPHY

2020 ◽  
Vol 8 (10) ◽  
pp. 305-315
Author(s):  
Martin Mariyanov ◽  
Keyword(s):  
Mobile Phone ◽  
Everyday Life ◽  
Mobile Phones ◽  
Dental Practice ◽  
First Choice ◽  
Good For ◽  
Dental Photography ◽  
Constant Improvement

Introduction:With the constant improvement of technology in recent years, mobile dental photography is gaining more and more popularity. Mobile phones have almost completely replaced compact cameras in everyday life. Aim:The aim is to determine whether a mobile phone can be used to take standard pictures of patients in daily dental practice. Material and methods:A total of 330extraoral photographs were taken of 33 patients. 10 photos were taken of each of them (5 extraoral and 5 intraoral).From the five photos there were one taken with a DSLR camera and four with a mobile phone with different magnification x2, x3, x4 and x5 and respectively from different distances. Eleven linear parameters were measured and compared. Results: In the photos taken with a mobile phone there is a deformation of the image compared to the photos taken with a DSLR camera at all magnifications. The largest deformation is at twice the magnification. The image is close to the photos taken with a DSLR camera at four and five times the magnification. Conclusion:The mobile phone is applicable for the extraoral dental photography. At four times magnification(x4) and distance of 110 cm the deformation of the image is negligible and the quality of the photos is good. For the intraoral photos if there is a need for an image with the correct and as close as possible to the actual proportions of the teeth, the first choice is the DSLR camera.

scholarly journals A novel method for the codecs’ performance analysis in mobile telephony systems

2020 ◽  
Vol 33 (2) ◽  
pp. 243-259
Author(s):  
Aleksandar Lebl ◽  
Dragan Mitic ◽  
Vladimir Matic ◽  
Mladen Mileusnic ◽  
Zarko Markov
Keyword(s):  
Quality Of Service ◽  
Flow Rate ◽  
Mobile Communications ◽  
Voice Quality ◽  
Mobile Telephony ◽  
Mobile Telecommunication ◽  
Telecommunication System ◽  
Full Rate ◽  
Novel Method

This paper presents a novel method of expressing the quality of service in a mobile telecommunication system when its performance depends on several factors including applied codecs? characteristics (voice quality and data flow rate) and telecommunications traffic service possibilities. The influence of these factors is unified in one variable - quality of service measure. The proposed method is especially applicable in the cases when two-dimensional systems are analyzed - for example when two codecs with different flow rate and different achievable connection quality are used in a system. As an example, we also studied system with full-rate or mixed full-rate and half-rate codec implementation depending on the offered traffic. The system performances - mean dataflow and mean connection quality as a function of offered traffic are presented graphically and also expressed quantitatively by the novel quality of service measure. The systems with different number of available traffic channels may be compared on the base of this novel evaluation value such that the system with the highest value is the most suitable one for the concrete situation. In this way mobile system design is simplified to the great extent. The developed model is applicable generally for mobile telephony systems defining, but in this paper we studied its implementation for Global System for Mobile communications.

Sign in / Sign up

Export Citation Format

Share Document