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10 results for “Ear Acoustics”
The IHA database of human geometries including torso, head and complete outer ears for acoustic research
<p>This is the first version of the IHA database, which is being created in the project HAPPAA C1 funded by the Deutsche Forschungsgemeinschaft (DFG) – Projektnummer 352015383 - SFB 1330 C1. (https://uol.de/en/sfb-1330-hearing-acoustics)</p> <p>The database includes a subsample of 10 human geometries comprising the torso, head and the entire outer ear including the ear canal and eardrum. The data are available in two different 3D object formats: ply binary file, stl binary file.</p>
Text-fig. 7. Metacheiromys marshi, USNM-P 452349, basicranium isosurface from CT scans in oblique ventral view, showing middle ear ossicles as preserved. On the specimen's left side, the ossicles are essentially in life position, with the stapes largely hidden in the fenestra vestibuli; the left malleus is broken and represented largely by the mallear head. On the specimen's right side, most of the floor of auditory bulla has been removed to expose the malleus, which has shifted posteriorly from the life position. Abbreviations: aptt – anteroventral process of tegmen tympani, bo – basioccipital, bs – basisphenoid, eam – squamosal roof of external acoustic meatus, eo – exoccipital, gf – glenoid fossa, i – incus, m – malleus, mh – mallear head, oc – occipital condyle, pr – promontorium of petrosal, sh – stapedial head, tm – part of tubular external acoustic meatus. in Skeletal Anatomy Of The Basicranium And Auditory Region In The Metacheiromyid Palaeanodont Metacheiromys (Mammalia, Pholidotamorpha) Based On High-Resolution Ct Scans
Text-fig. 7. Metacheiromys marshi, USNM-P 452349, basicranium isosurface from CT scans in oblique ventral view, showing middle ear ossicles as preserved. On the specimen's left side, the ossicles are essentially in life position, with the stapes largely hidden in the fenestra vestibuli; the left malleus is broken and represented largely by the mallear head. On the specimen's right side, most of the floor of auditory bulla has been removed to expose the malleus, which has shifted posteriorly from the life position. Abbreviations: aptt – anteroventral process of tegmen tympani, bo – basioccipital, bs – basisphenoid, eam – squamosal roof of external acoustic meatus, eo – exoccipital, gf – glenoid fossa, i – incus, m – malleus, mh – mallear head, oc – occipital condyle, pr – promontorium of petrosal, sh – stapedial head, tm – part of tubular external acoustic meatus.
Dataset of acoustic intensity vector measurements around an upscaled ear model
<p>A dataset of acoustic vector (particle velocity vector and scalar sound pressure) measurements of the sound field around an upscaled model of an ear. Data collected in July 2022 at the Aalto Acoustics Lab in Espoo, Finland.</p> <p>See the companion paper at AES for information about the contents of the dataset, measurement methodology, and example scripts.</p> <p>See the companion repository <a href="https://github.com/aaron-geldert/upscaled-ear-model-scripts">github.com/aaron-geldert/upscaled-ear-model-scripts</a> for example MATLAB scripts using the dataset.</p> <p>Correspondence should be directed to <a href="mailto:aarongeldert@gmail.com?subject=RE%20Big%20Ear%20Dataset%20(Zenodo)">Aaron Geldert (aarongeldert@gmail.com)</a>. <br> </p>
A narrow ear canal reduces sound velocity to 1 create additional acoustic inputs in a micro-scale insect ear
<p><span><span><span><span><span><span><span><span><span><span><span>Located in the forelegs, katydid ears are unique among arthropods in having outer, middle and inner component, analogous to the mammalian ear. Unlike mammals, sound is received externally, and internally via a narrow ear canal (EC) derived from the respiratory tracheal system. Inside the EC sound travels slower than in free air, causing temporal and pressure differences between external and internal inputs. The delay is suspected to arise as sound propagation changes from adiabatic to isothermal, imposed by EC geometry. If true, a reduction in sound velocity should persist independently of the gas composition in the EC. Integrating experimental (laser Doppler vibrometry, micro-CT) and numerical methods, we demonstrate that the narrow radius of the EC is the major cause of the signal time delay. Results imply that the EC is asymmetrically bifurcated, creating four notable auditory paths for each ear. Implication of methods and findings in avian hearing are discussed.</span></span></span></span></span></span></span></span></span></span></span></p>
A narrow ear canal reduces sound velocity to 1 create additional acoustic inputs in a micro-scale insect ear
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Data from: Processing of simple and complex acoustic signals in a tonotopically organized ear
Processing of complex signals in the hearing organ remains poorly understood. This paper aims to contribute to this topic by presenting investigations on the mechanical and neuronal response of the hearing organ of the tropical bushcricket species Mecopoda elongata to simple pure tone signals as well as to the conspecific song as a complex acoustic signal. The high-frequency hearing organ of bushcrickets, the crista acustica (CA), is tonotopically tuned to frequencies between about 4 and 70 kHz. Laser Doppler vibrometer measurements revealed a strong and dominant low-frequency-induced motion of the CA when stimulated with either pure tone or complex stimuli. Consequently, the high-frequency distal area of the CA is more strongly deflected by low-frequency-induced waves than by high-frequency-induced waves. This low-frequency dominance will have strong effects on the processing of complex signals. Therefore, we additionally studied the neuronal response of the CA to native and frequency-manipulated chirps. Again, we found a dominant influence of low-frequency components within the conspecific song, indicating that the mechanical vibration pattern highly determines the neuronal response of the sensory cells. Thus, we conclude that the encoding of communication signals is modulated by ear mechanics.
Data from: Processing of simple and complex acoustic signals in a tonotopically organized ear
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Transcriptomic analysis of the zebrafish inner ear points to growth hormone mediated regeneration following acoustic trauma
GEO Series GSE29669. Danio rerio. 9 samples. Type: Expression profiling by array.
Middle-ear Reflex Testing Using Wideband Acoustic Immittance
ClinicalTrials.gov study NCT04875637. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
A Cell Type-Specific Atlas of the Inner Ear Transcriptional Response to Acoustic Trauma
GEO Series GSE168973. Mus musculus. 32 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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