Individual in situ calibration of in-ear noise dosimeters

Bonnet, Fabien; Nélisse, Hugues; Nogarolli, Marcos A.C.; Voix, Jérémie

doi:10.1016/j.apacoust.2019.107015

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…The present and previous results demonstrate that such effects have to be taken into account when designing hearing devices with an In-Ear microphone. While several other studies presented developments exploiting an In-Ear microphone that was usually placed at the inner face of the device rather than inside the vent [24,44,45,47], to our knowledge only [45] reported on the RECTF directly, and identified similar dependence on the sound source as revealed here. Thus, identifying optimum designs based on the literature and the present results is not possible and further research is necessary to understand the underlying mechanisms and assure sourceindependent RECTFs in future hearing device designs.…”

Section: Transfer Functions In the Residual Ear Canalsupporting

confidence: 68%

The Hearpiece database of individual transfer functions of an in-the-ear earpiece for hearing device research

Denk

Kollmeier

2020

Acta Acust.

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We present a database of acoustic transfer functions of the Hearpiece, a commercially available multi-microphone multi-driver in-the-ear earpiece for hearing device research. The database includes HRTFs for 87 incidence directions as well as responses of the drivers, all measured at the four microphones of the Hearpiece as well as the eardrum in the occluded and open ear. The transfer functions were measured in both ears of 25 human participants and a KEMAR with anthropometric pinnae for five insertions of the device. We describe the measurements of the database and analyse derived acoustic parameters of the device. All regarded transfer functions are subject to differences between participants and insertions. Also, the KEMAR measurements are close to the median of human data in the present results for all assessed transfer functions. The database is a rich basis for development, evaluation and robustness analysis of multiple hearing device algorithms and applications. It is openly available at https://doi.org/10.5281/zenodo.3733190.

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Section: Transfer Functions In the Residual Ear Canalsupporting

confidence: 68%

The Hearpiece database of individual transfer functions of an in-the-ear earpiece for hearing device research

Denk

Kollmeier

2020

Acta Acust.

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“…For thin coating panels, 15-20% porous holes are sufficient for good low-frequency sound absorption. [30] The sound source will produce sound waves that can reach the human eardrum and generate vibrations in the eardrum membrane. The vibrations that occur will be transmitted to three bones, namely the hammer (malleus), anvil (incus), and stirrup (stapes) which are connected to each other in the middle ear, which then move fluid in the snail-shaped hearing organ (cochlea) on the inside of the ear (inner ear).…”

Section: Discussionmentioning

confidence: 99%

Noise Intensity, Blood Pressure, and Pulse Rate in Textile Industry Workers

Chahyadhi¹,

Widjanarti²,

Ada

et al. 2022

PLACENTUM J. Ilmiah Kes. Apl.

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Background: Noise intensity that exceeds Threshold Limit Value (TLV) can give impacts on non-auditory on the workers in a factory, in the form of an increase in blood pressure and pulse rate. Currently, health problems due to noise have caused the company’s total loss to reach 300 billion dollars due to absenteeism rate, decreased productivity, and treatment for occupational diseases. Research in Indonesia, especially the textile industry in the city of Surakarta, shows that noise from weaving machines with an intensity above 100 dBA affects blood pressure and pulse rate. This research was conducted at textile industry in Surakarta, one of the largest textile companies in Surakarta where the company has not been able to overcome the problem of noise intensity that exceeds the TLV which has the potential to cause blood pressure and pulse disturbances, and even decreased hearing function. This study aims to determine the relationship between noise intensity with blood pressure and pulse rate in textile industry workers. Method: This research is a correlation study, which is connecting the measurement variables of noise intensity with blood pressure and pulse rate. The sample in this study were 30 female workers in the weaving division who met the inclusion and exclusion criteria. The instruments used in measuring noise were sound level meters and sphygmomanometers. Data analysis used the Pearson correlation test to determine the relationship between noise intensity with blood pressure and pulse rate disturbances.Result: The study showed significant correlation between noise intensity and pulse rate with a p value of 0.029, but noise intensity with blood pressure disturbances does not correlate, with a p value of 0.443.Conclusion: There is a relationship between noise intensity and pulse rate of the workers in a factory.

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“…Evaluating the risk of NIHL requires a reliable method to measure and monitor noise or sound exposure. A number of studies have been done on the use of in-ear monitoring of noise exposure in occupational settings (Bonnet et al, 2015, 2019; Bonnet et al, 2020; Nadon et al, 2021; Nogarolli et al, 2019); however, limited research is available pertaining to in-ear monitoring of sound exposure in recreational settings. To our knowledge, only two studies have monitored listening behaviors using dosimetry measurements (Kaplan-Neeman et al, 2017; Portnuff et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Sound-level Monitoring Earphones With Smartphone Feedback as an Intervention to Promote Healthy Listening Behaviors in Young Adults

et al. 2021

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Objectives: More than a billion adolescents and youngsters are estimated to be at risk of acquiring recreational noise-induced hearing loss (RNIHL) due to the unsafe use of personal audio systems. RNIHL is preventable; therefore, the present study aimed to determine (i) the accuracy and reliability of dbTrack (Westone) sound-level monitoring earphones and (ii) the effect of sound-level monitoring earphones with smartphone feedback and hearing-health information as an intervention to promote healthy listening behaviors in young adults. Design: The study consisted of two phases: the first phase investigated the accuracy and reliability of dbTrack sound-level monitoring earphones. Accuracy was determined by comparing earphone measurements to sound level meter measurements. Intradevice reliability was determined by comparing earphone measurements during test-retest conditions. Nineteen participants were recruited through convenience sampling to determine within-subject reliability by comparing in-ear sound levels measured by the earphones during test-retest conditions. For the second phase of the study, a single-group pretest-posttest design was utilized. Forty participants, recruited through snowball sampling, utilized the sound-level monitoring earphones with the accompanying dbTrack smartphone application for 4 weeks. The application’s smartphone feedback was disabled during the first 2 weeks (pretest condition) and enabled during the last 2 weeks (posttest condition). Average daily intensities, durations, and sound dosages measured during pre- and posttest conditions were compared. Results: Phase 1 dbTrack earphone measurements were within 1 dB when compared with sound level meter measurements. Earphones were also within 1 dB in repeated measures across earphones and across participants. Phase 2 posttest average daily intensity decreased by 8.7 dB (18.3 SD), duration decreased by 7.6 minutes (46.6 SD), and sound dose decreased by 4128.4% (24965.5% SD). Differences in intensity and sound dose were significantly lower with a small and medium effect size, respectively. Conclusions: This study’s preliminary data indicate that dbTrack (Westone) sound-level monitoring earphones with a calibrated in-ear microphone can reliably and accurately measure personal audio systems sound exposure. Preliminary results also suggest that feedback on sound exposure using the accurate sound-level monitoring earphones with the accompanying dbTrack application can potentially promote safe listening behavior in young adults and reduce the risk of acquiring an RNIHL.

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Individual in situ calibration of in-ear noise dosimeters

Cited by 6 publications

References 16 publications

The Hearpiece database of individual transfer functions of an in-the-ear earpiece for hearing device research

The Hearpiece database of individual transfer functions of an in-the-ear earpiece for hearing device research

Noise Intensity, Blood Pressure, and Pulse Rate in Textile Industry Workers

Sound-level Monitoring Earphones With Smartphone Feedback as an Intervention to Promote Healthy Listening Behaviors in Young Adults

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