Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"sound exposure"”.
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Hearing Sensitivity and the Effect of Sound Exposure on the Axolotl (Ambystoma Mexicanum)
… were then subjected to a 48-hour, 150 Hz sound exposure at approximately 170 dB (re 1 μPa). AEPs were then performed to measure hearing thresholds immediately after sound exposure and at 2, 4, and 8 days post-sound exposure (DPSE). In the baseline audiogram, axolotls were most sensitive at …
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Listening to urban sound: A mixed-method approach for understanding human mobility, individual sound exposure, and psychological well-being
… among human movement, environmental exposure, and their effects on human health. Urbanization brings about ever-growing noise problems in cities. Exposure to high levels of sound is associated with health risks involving annoyance, disturbance, stress, cognitive performance …
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The Time-Course of the Effects of Growth Hormone During Zebrafish (<i>DANIO RERIO</i>) Auditory Hair Cell Regeneration
… upregulated in the zebrafish inner ear following sound exposure in a previous study. To identify the specific role of GH in hair cell regeneration and the possible cellular mechanisms of this regeneration, groups of zebrafish were divided into baseline (no sound exposure, no injection), …
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The Effect of Sound on Captive Chimpanzees (<i>Pan troglodytes</i>)
<p>Sound exposure can have detrimental physiological and psychological effects on humans, but effects on nonhuman primates are not as well understood. Captive chimpanzees are exposed to markedly different acoustic environments than their wild counterparts. This study assessed the organic soundscape …
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PLASTIC CHANGES IN THE INHIBITORY GLYCINE SYSTEM OF THE DORSAL COCHLEAR NUCLEUS (DCN) IN A RAT MODEL OF TINNITUS
… rats using 116 dB (SPL) unilateral octave-band sound exposures centered at 16 kHz for one hour in an anesthetized preparation. Rats were assessed behaviorally by an operant conditioning paradigm as well as a gap detection method to verify the development of tinnitus. Both young (7 mos.) and aged …
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Melanin as an Oto-Protective Pigment in Two Fish Species: <i> Poecilia Latipinna </i> and <i>Cyprinus Carpio </i>
… thresholds were quantified before and after sound exposure (150 Hz tone at 165 dB re 1 μPa for 48 h) by measuring auditory evoked potentials (AEPs). Melanin levels were associated with scale color, with black morphs having more inner ear melanin than white or golden morphs. TEM imaging showed …
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Protein and viral partitioning in two-phase aqueous micellar systems
… nucleus) labeling. Second, the effect of past sound exposure on brain response to sound was examined. After daily exposure to a sound, labeling evoked by that sound was markedly decreased in cortex, but not in brainstem. In two very different conditions, hearing loss and prior sound exposure, …
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The Effects of Growth Hormone in the Inner Ear of Zebrafish (<i>Danio rerio</i>) during Hair Cell Regeneration
… regeneration have not been examined after noise exposure. To understand the effect of GH in hair cell regeneration, adult zebrafish were exposed to a 150 Hz pure tone at a source level of 179 dB re 1 μPa RMS for 36 hours. Afterward the fish were immediately injected intraperitoneally with carp …
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Next Generation Sequencing Reveals Gene Expression Patterns in the Zebrafish Inner Ear Following Growth Hormone Injection
… (GH) was significantly upregulated after noise exposure. In this current study, we utilized Next Generation Sequencing (NGS) to examine the genes and pathways that are significantly regulated in the zebrafish inner ear following sound exposure and GH injection. Four groups of 20 zebrafish each …
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Experimental Design, Data Analysis, and Modeling for Characterizing the Three-Dimensional Acoustic Field of a Seismic Airgun Array
… experiment were analyzed to obtain zero-to-peak sound pressures, sound exposure levels, and pressure levels in 1/3-octave frequency bands. In addition, the experimental data were modeled by using a modified underwater acoustic propagation model to fill in missing data measurements. The resulting …
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Tranquillity by design - Architectural and landscape interventions to improve the soundscape quality in urban areas exposed to aircraft noise
… on the level of disturbance induced by the sound and individuals’ perceived level of their own ability to cope with and control it. Traditionally, noise prediction models are used to determine the noise load around airports. If levels are deemed too high, building restrictions are put in …
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Regulation of the development and regeneration of the zebrafish posterior lateral line
… factors such as high decibel and prolonged sound exposure, genetic lesions, age, illnesses, and ototoxic medications including aminoglycoside antibiotics and some chemotherapy drugs. Aquatic vertebrates such as zebrafish (Danio rerio) have a specialized class of mechanosensory hair cells …
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The Importance of Bioacoustics for Dolphin Welfare: Soundscape Characterization with Implications for Management
<p>Sound is the primary sensory modality for dolphins, yet policies mitigating anthropogenic sound exposure are limited in wild populations and even fewer noise policies or guidelines have been developed for governing dolphin welfare under human care. Concerns have been raised that dolphins under …