Jurado, C;
Marquardt, T;
(2016)
The effect of the helicotrema on low-frequency loudness perception.
Journal of the Acoustical Society of America
, 140
(5)
, Article 3799. 10.1121/1.4967295.
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Abstract
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. In addition, the inverse shapes of their METFs were obtained by adjusting the intensity of a low-frequency suppressor tone to maintain an equal suppression depth of otoacoustic emissions for various suppressor tone frequencies (20–250 Hz). For 11 subjects, the METFs showed a resonance. Six of them had coinciding features in both ears, and also in their ELC. For two subjects only the right-ear METF was obtainable, and in one case it was consistent with the ELC. One other subject showed a consistent lack of the feature in their ELC and in both METFs. Although three subjects displayed clear inconsistencies between both measures, the similarity between inverse METF and ELC for most subjects shows that the helicotrema has a marked impact on low-frequency sound perception.
Type: | Article |
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Title: | The effect of the helicotrema on low-frequency loudness perception |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1121/1.4967295 |
Publisher version: | http://dx.doi.org/10.1121/1.4967295 |
Language: | English |
Additional information: | © 2016 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in: Jurado C, Marquardt T, The effect of the helicotrema on low-frequency loudness perception, in: The Journal of the Acoustical Society of America 140, 3799 (2016), and may be found athttp://dx.doi.org/10.1121/1.4967295 |
Keywords: | Science & Technology, Technology, Life Sciences & Biomedicine, Acoustics, Audiology & Speech-Language Pathology, Sound Pressure Measurements, Human Temporal Bones, Human Middle-Ear, Input Impedance, Otoacoustic Emissions, Chinchilla Cochlea, Hair-Cells, Guinea-Pig, Pure-Tones, 100 Hz |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > The Ear Institute |
URI: | https://discovery.ucl.ac.uk/id/eprint/1533245 |
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