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https://www.readbyqxmd.com/read/27921347/objective-snoring-time-and-carotid-intima-media-thickness-in-non-apneic-female-snorers
#1
Jinyoung Kim, Allan I Pack, Barbara J Riegel, Julio A Chirinos, Alexandra Hanlon, Seung Ku Lee, Chol Shin
Controversy persists about whether snoring can affect atherosclerotic changes in adjacent vessels, independently of obstructive sleep apnea and other cardiovascular risk factors. This study examined the independent association between snoring and carotid artery intima-media thickness (IMT) in non-apneic snorers and non-snorers. We studied 180 non-apneic snorers and non-snorers participating in a full-night home-based sleep study. Snoring sound was measured objectively by a microphone. Based on snoring time across the night, participants were classified as non-snorers (snoring time: 0%), mild snorers (1-25%) and moderate to heavy snorers (≥25%)...
December 6, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27914370/concurrent-measures-of-contralateral-suppression-of-transient-evoked-otoacoustic-emissions-and-of-auditory-steady-state-responses
#2
Ian B Mertes, Marjorie R Leek
Contralateral suppression of otoacoustic emissions (OAEs) is frequently used to assess the medial olivocochlear (MOC) efferent system, and may have clinical utility. However, OAEs are weak or absent in hearing-impaired ears, so little is known about MOC function in the presence of hearing loss. A potential alternative measure is contralateral suppression of the auditory steady-state response (ASSR) because ASSRs are measurable in many hearing-impaired ears. This study compared contralateral suppression of both transient-evoked otoacoustic emissions (TEOAEs) and ASSRs in a group of ten primarily older adults with either normal hearing or mild sensorineural hearing loss...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27913454/the-anti-bat-strategy-of-ultrasound-absorption-the-wings-of-nocturnal-moths-bombycoidea-saturniidae-absorb-more-ultrasound-than-the-wings-of-diurnal-moths-chalcosiinae-zygaenoidea-zygaenidae
#3
Athanasios Ntelezos, Francesco Guarato, James F C Windmill
The selection pressure from echolocating bats has driven the development of a diverse range of anti-bat strategies in insects. For instance, several studies have proposed that the wings of some moths absorb a large portion of the sound energy contained in a bat's ultrasonic cry; as a result, the bat receives a dampened echo, and the moth becomes invisible to the bat. To test the hypothesis that greater exposure to bat predation drives the development of higher ultrasound absorbance, we used a small reverberation chamber to measure the ultrasound absorbance of the wings of nocturnal (Bombycoidea: Saturniidae) and diurnal moths (Chalcosiinae: Zygaenoidea: Zygaenidae)...
December 2, 2016: Biology Open
https://www.readbyqxmd.com/read/27913020/influences-of-combined-traffic-noise-on-anxiety-in-mice
#4
Guoqing Di, Yaqian Xu
With the rapid development of traffic facilities in China, traffic noise pollution is increasingly prominent. This research aims to explore the influences of combined traffic noise on receptors' anxiety. Institute of cancer research mice were exposed to combined traffic noise (CTN) from highway and high-speed railway for 52days, whose day-night equivalent continuous A-weighted sound pressure level (Ldn) was 70dB(A). The impacts of CTN on anxiety were explored by behavior tests and monoamine neurotransmitter assays...
November 29, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27909837/simultaneous-intracochlear-pressure-measurements-from-two-cochlear-locations-propagation-of-distortion-products-in-gerbil
#5
Wei Dong
Sound energy propagates in the cochlea through a forward-traveling or slow wave supported by the cochlear partition and fluid inertia. Additionally, cochlear models support traveling wave propagation in the reverse direction as the expected mechanism for conveying otoacoustic emissions out of the cochlea. Recently, however, this hypothesis has been questioned, casting doubt on the process by which otoacoustic emissions travel back out through the cochlea. The proposed alternative reverse travel path for emissions is directly through the fluids of the cochlea as a compression pressure in the form of a fast wave...
December 1, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27908066/discrimination-of-amplitude-modulation-depth-by-subjects-with-normal-and-impaired-hearing
#6
Josef Schlittenlacher, Brian C J Moore
The loudness recruitment associated with cochlear hearing loss increases the perceived amount of amplitude modulation (AM), called "fluctuation strength." For normal-hearing (NH) subjects, fluctuation strength "saturates" when the AM depth is high. If such saturation occurs for hearing-impaired (HI) subjects, they may show poorer AM depth discrimination than NH subjects when the reference AM depth is high. To test this hypothesis, AM depth discrimination of a 4-kHz sinusoidal carrier, modulated at a rate of 4 or 16 Hz, was measured in a two-alternative forced-choice task for reference modulation depths, mref, of 0...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27908034/the-effect-of-the-helicotrema-on-low-frequency-loudness-perception
#7
Carlos Jurado, Torsten Marquardt
Below approximately 40 Hz, the cochlear travelling wave reaches the apex, and differential pressure is shunted through the helicotrema, reducing hearing sensitivity. Just above this corner frequency, a resonance feature is often observed in objectively measured middle-ear-transfer functions (METFs). This study inquires whether overall and fine structure characteristics of the METF are also perceptually evident. Equal-loudness-level contours (ELCs) were measured between 20 and 160 Hz for 14 subjects in a purpose-built test chamber...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27880786/effects-of-pile-driving-on-the-residency-and-movement-of-tagged-reef-fish
#8
Joseph D Iafrate, Stephanie L Watwood, Eric A Reyier, Douglas M Scheidt, Georges A Dossot, Steven E Crocker
The potential effects of pile driving on fish populations and commercial fisheries have received significant attention given the prevalence of pile driving occurring in coastal habitats throughout the world. Behavioral impacts of sound generated from these activities on fish typically have a greater area of influence than physical injury, and may therefore adversely affect a greater portion of the local population. This study used acoustic telemetry to assess the movement, residency, and survival of 15 sheepshead (Archosargus probatocephalus) and 10 grey snapper (Lutjanus griseus) in Port Canaveral, Florida, USA, in response to 35 days of pile driving at a wharf complex...
2016: PloS One
https://www.readbyqxmd.com/read/27878557/simple-reaction-time-for-broadband-sounds-compared-to-pure-tones
#9
Josef Schlittenlacher, Wolfgang Ellermeier, Gül Avci
Although many studies have explored the relation between reaction time (RT) and loudness, including effects of intensity, frequency, and binaural summation, comparable work on spectral summation is rare. However, most real-world sounds are not pure tones and typically have bandwidths covering several critical bands. Since comparing to a 1-kHz pure tone, the reference tone, is important for loudness measurement and standardization, the present work focuses on comparing RTs for broadband noise to those for 1-kHz pure tones in three experiments using different spectral and binaural configurations...
November 22, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27878378/phonotactic-flight-of-the-parasitoid-fly-emblemasoma-auditrix-diptera-sarcophagidae
#10
Nanina Tron, Reinhard Lakes-Harlan
The parasitoid fly Emblemasoma auditrix locates its hosts using acoustic cues from sound producing males of the cicada Okanagana rimosa. Here, we experimentally analysed the flight path of the phonotaxis from a landmark to the target, a hidden loudspeaker in the field. During flight, the fly showed only small lateral deviations. The vertical flight direction angles were initially negative (directed downwards relative to starting position), grew positive (directed upwards) in the second half of the flight, and finally flattened (directed horizontally or slightly upwards), typically resulting in a landing above the loudspeaker...
November 22, 2016: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/27876301/overdrive-and-edge-as-refiners-of-belting-an-empirical-study-qualifying-and-categorizing-belting-based-on-audio-perception-laryngostroboscopic-imaging-acoustics-ltas-and-egg
#11
Julian McGlashan, Mathias Aaen Thuesen, Cathrine Sadolin
OBJECTIVES: We aimed to study the categorizations "Overdrive" and "Edge" from the pedagogical method Complete Vocal Technique as refiners of the often ill-defined concept of "belting" by means of audio perception, laryngostroboscopic imaging, acoustics, long-term average spectrum (LTAS), and electroglottography (EGG). STUDY DESIGN: This is a case-control study. METHODS: Twenty singers were recorded singing sustained vowels in a "belting" quality refined by audio perception as "Overdrive" and "Edge...
November 18, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27863609/the-impact-of-listening-to-pleasant-natural-sounds-on-anxiety-and-physiologic-parameters-in-patients-undergoing-coronary-angiography-a-pragmatic-quasi-randomized-controlled-trial
#12
Nahid Rejeh, Majideh Heravi-Karimooi, Seyed Davood Tadrisi, Ali Jahani, Mojtaba Vaismoradi, Sue Jordan
OBJECTIVE: This study aimed to investigate the impact of listening to pleasant natural sounds on anxiety and physiological parameters in patients undergoing coronary angiography. METHODS: The present pragmatic quasi-randomized controlled clinical trial was conducted on 130 patients undergone elective angiography. The participants were randomly divided into two groups, including a pleasant natural sounds group, and a control group (n1/2 65 per group). Spielberger's state/trait anxiety inventory was used to assess levels of anxiety...
November 2016: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/27859549/on-the-accurate-analysis-of-vibroacoustics-in-head-insert-gradient-coils
#13
Simone A Winkler, Andrew Alejski, Trevor Wade, Charles A McKenzie, Brian K Rutt
PURPOSE: To accurately analyze vibroacoustics in MR head gradient coils. THEORY AND METHODS: A detailed theoretical model for gradient coil vibroacoustics, including the first description and modeling of Lorentz damping, is introduced and implemented in a multiphysics software package. Numerical finite-element method simulations were used to establish a highly accurate vibroacoustic model in head gradient coils in detail, including the newly introduced Lorentz damping effect...
November 17, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27858100/-early-acoustic-evoked-potentials-in-patients-with-small-vestibular-schwannomas
#14
I Baljić, E Börner-Lünser, D Eßer, O Guntinas-Lichius
BACKGROUND: The prognostic potential of click-evoked early acoustic evoked potentials (EAEP) for vestibular schwannoma (VS) diagnostics is considered insufficient for tumors small than approximately <1.5 cm in diameter. However, up until now, the derivations at higher sound pressure levels have mainly been used for EAEP evaluation. The aim of this study was to examine whether registered EAEP are more sensitive to pathological changes at low sound pressure levels and with smaller tumors...
November 17, 2016: HNO
https://www.readbyqxmd.com/read/27852738/contributions-of-rapid-neuromuscular-transmission-to-the-fine-control-of-acoustic-parameters-of-birdsong
#15
Caitlin Mencio, Balagurunathan Kuberan, Franz Goller
Neural control of complex vocal behaviors, such as birdsong and speech, requires integration of biomechanical nonlinearities through muscular output. Although control of airflow and tension of vibrating tissues are known functions of vocal muscles, it remains unclear how specific muscle characteristics contribute to specific acoustic parameters. To address this gap, we removed heparan sulfate chains using heparitinases to subtly perturb neuromuscular transmission in the syrinx of adult male zebra finches (Taeniopygia guttata)...
November 16, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27831974/outcomes-of-palatal-lift-prosthesis-on-dysarthric-speech
#16
Firas S D Alfwaress, Abdel Rahim Bibars, Abedelhadi Hamasha, Emad Al Maaitah
PURPOSE: This study was designed to investigate the effect of palatal lift prosthesis (PLP) on the speech of individuals with different types of dysarthria. PARTICIPANTS: Thirty (19 males and 11 females) native speakers of Jordanian Arabic with dysarthria participated in the study. The age of the participants ranged from 8 to 67 years with an average of 34.1 years. Traumatic brain injury was the most common etiology of dysarthria among 12 participants, stroke among 11, multiple sclerosis among 3, and pseudobulbar palsy among 2; 1 participant had Parkinson disease, and another participant had amyotrophic lateral sclerosis...
November 9, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27819704/-acoustic-conditions-in-open-plan-offices-pilot-test-results
#17
Witold Mikulski
BACKGROUND: The main source of noise in open plan office are conversations. Office work standards in such premises are attained by applying specific acoustic adaptation. This article presents the results of pilot tests and acoustic evaluation of open space rooms. MATERIAL AND METHODS: Acoustic properties of 6 open plan office rooms were the subject of the tests. Evaluation parameters, measurement methods and criterial values were adopted according to the following standards: PN-EN ISO 3382- 3:2012, PN-EN ISO 3382-2:2010, PN-B-02151-4:2015-06 and PN-B-02151-3:2015-10...
2016: Medycyna Pracy
https://www.readbyqxmd.com/read/27816873/long-range-measurement-system-using-ultrasonic-range-sensor-with-high-power-transmitter-array-in-air
#18
Sahdev Kumar, Hideo Furuhashi
A long-range measurement system comprising an ultrasonic range sensor with a high-power ultrasonic transmitter array in air was investigated. The system is simple in construction and can be used under adverse conditions such as fog, rain, darkness, and smoke. However, due to ultrasonic waves are well absorbed by air molecules, the measurable range is limited to a few meters. Therefore, we developed a high-power ultrasonic transmitter array consisting of 144 transmitting elements. All elements are arranged in the form of a 12×12 array pattern...
February 2017: Ultrasonics
https://www.readbyqxmd.com/read/27807249/singing-whales-generate-high-levels-of-particle-motion-implications-for-acoustic-communication-and-hearing
#19
T Aran Mooney, Maxwell B Kaplan, Marc O Lammers
Acoustic signals are fundamental to animal communication, and cetaceans are often considered bioacoustic specialists. Nearly all studies of their acoustic communication focus on sound pressure measurements, overlooking the particle motion components of their communication signals. Here we characterized the levels of acoustic particle velocity (and pressure) of song produced by humpback whales. We demonstrate that whales generate acoustic fields that include significant particle velocity components that are detectable over relatively long distances sufficient to play a role in acoustic communication...
November 2016: Biology Letters
https://www.readbyqxmd.com/read/27794321/theoretical-investigation-of-the-effects-of-the-cushion-on-reducing-underwater-noise-from-offshore-pile-driving
#20
Qingpeng Deng, Weikang Jiang, Wenzheng Zhang
Offshore pile driving noise has gained increasing attention due to its adverse influence on marine animals. Two models are established to investigate the influence of the cushion on the underwater noise from pile driving. A one-dimensional nonlinear finite difference model is developed to compute the impact force and the soil penetration. The radiated sound pressure is predicted by the second model based on a semi-analytical variational formulation. For the examined pile, a proper cushion can significantly dampen the high-frequency impact force and reduce the peak of the sound pressure...
October 2016: Journal of the Acoustical Society of America
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