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https://www.readbyqxmd.com/read/28097504/estimating-the-relative-weights-of-visual-and-auditory-tau-versus-heuristic-based-cues-for-time-to-contact-judgments-in-realistic-familiar-scenes-by-older-and-younger-adults
#1
Behrang Keshavarz, Jennifer L Campos, Patricia R DeLucia, Daniel Oberfeld
Estimating time to contact (TTC) involves multiple sensory systems, including vision and audition. Previous findings suggested that the ratio of an object's instantaneous optical size/sound intensity to its instantaneous rate of change in optical size/sound intensity (τ) drives TTC judgments. Other evidence has shown that heuristic-based cues are used, including final optical size or final sound pressure level. Most previous studies have used decontextualized and unfamiliar stimuli (e.g., geometric shapes on a blank background)...
January 17, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28062201/effects-of-sound-pressure-level-and-visual-perceptual-load-on-the-auditory-mismatch-negativity
#2
Malina Szychowska, Rasmus Eklund, Mats E Nilsson, Stefan Wiens
Auditory change detection has been studied extensively with mismatch negativity (MMN), an event-related potential. Because it is unresolved if the duration MMN depends on sound pressure level (SPL), we studied effects of different SPLs (56, 66, and 76dB) on the duration MMN. Further, previous research suggests that the MMN is reduced by a concurrent visual task. Because a recent behavioral study found that high visual perceptual load strongly reduced detection sensitivity to irrelevant sounds, we studied if the duration MMN is reduced by load, and if this reduction is stronger at low SPLs...
January 3, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28062093/resonance-tube-or-lax-vox
#3
Jaana Tyrmi, Vojtěch Radolf, Jaromír Horáček, Anne-Maria Laukkanen
OBJECTIVE: This study compares the flow resistance of Resonance tube (RT) and Lax Vox tube (LVT) when submerged 2 cm and 10 cm in water, as well as phonation into the tubes in these conditions. METHODS: In the in vitro experiment, the air pressure for flow rates of 60-600 mL/s was measured at the tube inlet, when the outer end of the tube was submerged 2 cm and 10 cm below water surface in 30°, 45°, and 90° angle. In the in vivo experiment, 14 subjects phonated in habitual loudness and loudly into both tubes, with the outer end 2 cm and 10 cm in water...
January 3, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28056335/effects-of-handling-and-environment-on-preterm-newborns-sleeping-in-incubators
#4
Kelly Cristina Sbampato Calado Orsi, Marta José Avena, Marcia Lurdes de Cacia Pradella-Hallinan, Mavilde da Luz Gonçalves Pedreira, Miriam Harumi Tsunemi, Ariane Ferreira Machado Avelar, Eliana Moreira Pinheiro
OBJECTIVE: To describe the total sleep time, stages of sleep, and wakefulness of preterm newborns and correlate them to levels of sound pressure, light, temperature, relative air humidity, and handling inside incubators. DESIGN: Observational, correlational study. SETTING: A neonatal intermediate care unit. PARTICIPANTS: Twelve preterm newborns, who were 32.2 ± 4.2 weeks gestational age and weighed 1,606 ± 317 g. METHODS: Sleep records were assessed by polysomnograph...
January 2, 2017: Journal of Obstetric, Gynecologic, and Neonatal Nursing: JOGNN
https://www.readbyqxmd.com/read/28056265/-a-cohort-study-on-occupational-noise-induced-hearing-loss-in-workers-at-an-iron-and-steel-plant
#5
S F Yu, G S Chen, J Jiao, G Z Gu, H L Zhang, X M Wang, W H Zhou, H Wu, Y H Li, Y X Zheng
Objective: To analyze the incidence rate of occupational noise-induced hearing loss in noise-exposed workers in an iron and steel plant from 2006 to 2015. Methods: Using a cohort study method, workers exposed to occupational noise from Jan 1, 2006 to Dec 12, 2015 were followed up and the pure tone hearing test was conducted. In total, 6 297 subjects completed two or more physical checks and the pure tone hearing test and were included in the analysis. The noise exposure level at the workplace and the equivalent continuous A-weighted sound pressure level for workers was monitored and the cumulative noise exposure dose was evaluated...
January 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28045835/normative-wideband-reflectance-equivalent-admittance-at-the-tympanic-membrane-and-acoustic-stapedius-reflex-threshold-in-adults
#6
M Patrick Feeney, Douglas H Keefe, Lisa L Hunter, Denis F Fitzpatrick, Angela C Garinis, Daniel B Putterman, Garnett P McMillan
OBJECTIVES: Wideband acoustic immittance (WAI) measures such as pressure reflectance, parameterized by absorbance and group delay, equivalent admittance at the tympanic membrane (TM), and acoustic stapedius reflex threshold (ASRT) describe middle ear function across a wide frequency range, compared with traditional tests employing a single frequency. The objective of this study was to obtain normative data using these tests for a group of normal-hearing adults and investigate test-retest reliability using a longitudinal design...
December 30, 2016: Ear and Hearing
https://www.readbyqxmd.com/read/28045447/investigation-of-indoor-air-quality-in-houses-of-macedonia
#7
Silvia Vilčeková, Ilija Zoran Apostoloski, Ľudmila Mečiarová, Eva Krídlová Burdová, Jozef Kiseľák
People who live in buildings are exposed to harmful effects of indoor air pollution for many years. Therefore, our research is aimed to investigate the indoor air quality in family houses. The measurements of indoor air temperature, relative humidity, total volatile organic compounds (TVOC), particulate matters (PM) and sound pressure level were carried out in 25 houses in several cities of the Republic of Macedonia. Mean values of indoor air temperature and relative humidity ranged from 18.9 °C to 25.6 °C and from 34...
January 1, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28040046/diffusion-tensor-imaging-reveals-changes-in-the-adult-rat-brain-following-long-term-and-passive-moderate-acoustic-exposure
#8
Sherwin Abdoli, Leon C Ho, Jevin W Zhang, Celia M Dong, Condon Lau, Ed X Wu
This study investigated neuroanatomical changes following long-term acoustic exposure at moderate sound pressure level (SPL) under passive conditions, without coupled behavioral training. The authors utilized diffusion tensor imaging (DTI) to detect morphological changes in white matter. DTIs from adult rats (n = 8) exposed to continuous acoustic exposure at moderate SPL for 2 months were compared with DTIs from rats (n = 8) reared under standard acoustic conditions. Two distinct forms of DTI analysis were applied in a sequential manner...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28040032/scattering-of-turbulent-jet-wavepackets-by-a-swept-trailing-edge
#9
Selene Piantanida, Vincent Jaunet, Jérôme Huber, William R Wolf, Peter Jordan, André V G Cavalieri
Installed jet noise is studied by means of a simplified configuration comprising a flat plate in the vicinity of a round jet. The effects of Mach number, jet-plate radial distance, and trailing-edge sweep angle are explored. Acoustic measurements are performed using a traversable 18-microphone azimuthal array, providing pressure data at 360 points on a cylindrical surface surrounding the jet-plate system. Key observations include a decrease, with increasing Mach number, of the relative level of the scattered field in comparison to the uninstalled jet; an exponential dependence of the scattered sound pressure level on the radial jet-plate separation; and considerable sideline noise reductions with increasing sweep angle, with which there is an overall reduction in acoustic efficiency...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28040031/near-field-acoustic-holography-measurements-of-carbon-nanotube-thin-film-speakers
#10
Mahsa Asgarisabet, Andrew R Barnard, Troy M Bouman
Carbon nanotube (CNT) thin film speakers produce sound with the thermoacoustic effect. Better understanding of the physical acoustic properties of these speakers will drive future design improvements. Measuring acoustic properties at the surface of the CNT thin film is difficult because the films, themselves, do not vibrate, are fragile and have a high surface temperature. In order to measure the surface particle velocity and sound pressure level (SPL), near field acoustic holography (NAH) has been used by employing probe microphones...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28040016/quasilinear-reflection-as-a-possible-mechanism-for-suppressor-induced-otoacoustic-emission
#11
Yi-Wen Liu, Tzu-Chi Liu
A frequency-domain iterative approach is developed to compute the change in characteristic impedance in the cochlea due to the presence of a suppressor tone. Based on this approach, a small transient wave passing by the best place (BP) of the suppressor is predicted to be partially reflected because of the suppressor-induced impedance variation. This computational approach is tested on a nonlinear model of cochlear mechanics [Liu, J. Acoust. Soc. Am. 136, 1788-1796 (2014)]. When a 9-kHz suppressor at 60 dB sound pressure level is delivered to the model, the characteristic impedance decreases by ∼20% near its BP...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28039198/built-environment-and-health-a-systematic-review-of-studies-in-germany
#12
Maike Schulz, Matthias Romppel, Gesine Grande
OBJECTIVES: Empirical research on the relationship between the built environment and health is increasing at a tremendous pace. However, findings from Anglo-American countries may not apply to the European context. Therefore, we systematically reviewed the existing evidence on the role of the built environment for leading risk factors and health behavior in Germany. METHODS: Through an extensive search via PubMed and Web of Science, using predefined selection criteria, two independent reviewers identified 25 empirical studies...
December 29, 2016: Journal of Public Health
https://www.readbyqxmd.com/read/28029555/speech-adjustments-for-room-acoustics-and-their-effects-on-vocal-effort
#13
Pasquale Bottalico
OBJECTIVES: The aims of the present study are (1) to analyze the effects of the acoustical environment and the voice style on time dose (Dt_p) and fundamental frequency (mean f0 and standard deviation std_f0) while taking into account the effect of short-term vocal fatigue and (2) to predict the self-reported vocal effort from the voice acoustical parameters. METHODS: Ten male and ten female subjects were recorded while reading a text in normal and loud styles, in three rooms-anechoic, semi-reverberant, and reverberant-with and without acrylic glass panels 0...
October 28, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27991472/modeling-signal-to-noise-ratio-of-otoacoustic-emissions-in-workers-exposed-to-different-industrial-noise-levels
#14
Parvin Nassiri, Sajad Zare, Mohammad R Monazzam, Akram Pourbakht, Kamal Azam, Taghi Golmohammadi
INTRODUCTION: Noise is considered as the most common cause of harmful physical effects in the workplace. A sound that is generated from within the inner ear is known as an otoacoustic emission (OAE). Distortion-product otoacoustic emissions (DPOAEs) assess evoked emission and hearing capacity. The aim of this study was to assess the signal-to-noise ratio in different frequencies and at different times of the shift work in workers exposed to various levels of noise. It was also aimed to provide a statistical model for signal-to-noise ratio (SNR) of OAEs in different frequencies based on the two variables of sound pressure level (SPL) and exposure time...
November 2016: Noise & Health
https://www.readbyqxmd.com/read/27991466/prevalence-of-tinnitus-and-noise-induced-hearing-loss-in-dentists
#15
Jamie Myers, Andrew B John, Suzanne Kimball, Terry Fruits
INTRODUCTION: The purpose of this study was to evaluate noise levels in dental offices and to estimate the risk and prevalence of tinnitus and noise-induced hearing loss (NIHL) in practicing dentists. MATERIALS AND METHODS: First, measures were collected of sound pressure levels produced by dental handpieces and dental suction in the University of Oklahoma Health Sciences Center (OUHSC) College of Dentistry. Second, a survey was distributed to members of the Oklahoma Dental Association (ODA)...
November 2016: Noise & Health
https://www.readbyqxmd.com/read/27991463/parametric-method-for-the-noise-risk-assessment-of-professional-orchestral-musicians
#16
Matteo Bo, Marina Clerico, Federica Pognant
BACKGROUND: The Occupational Health and Safety (OH&S) literature shows that noise could represent a risk factor for professional orchestral musicians. The continuative exposition to elevated noise levels and the particular nature of the activity make necessary an "atypical" OH&S approach, which was identified to be necessarily organizational. MATERIALS AND METHODS: In this study, a parametric-based method for orchestral exposure assessment and management was developed...
November 2016: Noise & Health
https://www.readbyqxmd.com/read/27991459/early-indication-of-noise-induced-hearing-loss-from-pmp-use-in-adolescents-a-cross-sectional-analysis
#17
Diana C Colon, Ulla Verdugo-Raab, Carmelo P Alvarez, Thomas Steffens, Steven C Marcrum, Stefanie Kolb, Caroline Herr, Dorothee Twardella
CONTEXT: Distortion product otoacoustic emissions (DPOAEs) may indicate preclinical noise-induced hearing loss (NIHL) in adolescents from unsafe personal music player (PMP) use. AIMS: The objective, therefore, was to observe preclinical signs of NIHL in 9th grade adolescents with clinically normal hearing by comparing DPOAE signals between different levels of A-weighted equivalent PMP exposure. SETTINGS AND DESIGN: Subjects were recruited from all secondary-level schools located in the city of Regensburg, Germany during two academic years 2009/2010 and 2010/2011...
November 2016: Noise & Health
https://www.readbyqxmd.com/read/27988252/airway-and-circulatory-collapse-due-to-retropharyngeal-hematoma-after-blunt-vertebral-artery-injury
#18
Shunsuke Kudo, Kazuyuki Fukushima, Motonori Hashimoto, Masayuki Furutake, Keiji Tanaka, Kunihiko Okada
Retropharyngeal hematoma following blunt cervical spine injury is a known cause of airway obstruction, but it is not known to cause hemorrhagic shock. We report the case of a massive retropharyngeal hematoma caused by a blunt vertebral artery transection leading simultaneously to airway obstruction and hemorrhagic shock. An 83-year-old woman was injured in a motorcycle accident. In the field, the patient exhibited paradoxical breathing with no breath sounds, and her blood pressure could not be measured. Therefore, emergency intubation and fluid resuscitation were initiated and the patient was transferred to the emergency department...
December 9, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27959974/estimating-subglottal-pressure-from-neck-surface-acceleration-during-normal-voice-production
#19
Amanda S Fryd, Jarrad H Van Stan, Robert E Hillman, Daryush D Mehta
Purpose: The purpose of this study was to evaluate the potential for estimating subglottal air pressure using a neck-surface accelerometer and to compare the accuracy of predicting subglottal air pressure relative to predicting acoustic sound pressure level (SPL). Method: Indirect estimates of subglottal pressure (Psg') were obtained from 10 vocally healthy speakers during loud-to-soft repetitions of 3 different /p/-vowel gestures (/pa/, /pi/, /pu/) at 3 pitch levels in the modal register...
December 1, 2016: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/27943294/laryngeal-pacing-for-bilateral-vocal-fold-paralysis-voice-and-respiratory-aspects
#20
Andreas H Mueller, Rudolf Hagen, Claus Pototschnig, Gerhard Foerster, Wilma Grossmann, Katrin Baumbusch, Markus Gugatschka, Tadeus Nawka
OBJECTIVE: To evaluate the effects of neurostimulation with the laryngeal pacemaker (LP) system in patients with bilateral vocal fold paralysis (BVFP) in terms of voice quality and respiratory function. STUDY DESIGN: Feasibility study, first-in-human, single-arm, open-label, prospective, multicenter study with group-sequential design and 6-month follow-up period, as described in details in our previous publication. METHODS: Nine symptomatic BVFP subjects were unilaterally implanted with the LP system at three study sites in Germany and Austria...
December 10, 2016: Laryngoscope
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