High-sensitivity acoustic sensors from nanofibre webs

Lang, Chenhong; Fang, J.; Shao, Huili; Ding, Xin; Lin, Tong

doi:10.1038/ncomms11108

Cited by 285 publications

(249 citation statements)

References 33 publications

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“…Therefore, the presence of acoustic noise during MR imaging suggests the clear need for passive noise control by using a protective apparatus, or active noise control by using a modified sequence (ie, silent MR imaging) or gradient coil design (33). Another need supported by findings in our study is the real-time monitoring of SPL during the MR examination, which would be beneficial for the well-being of the patients (34) and might be realized as a low-cost microscale device embedded in the earplug (35). There are several limitations in our study.…”

Section: Alterations In Hearing Threshold Induced By Mr Imaging Acousmentioning

confidence: 73%

Temporary Hearing Threshold Shift in Healthy Volunteers with Hearing Protection Caused by Acoustic Noise Exposure during 3-T Multisequence MR Neuroimaging

Jin

et al. 2018

Radiology

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Purpose To determine whether a single 51-minute exposure to acoustic noise during 3-T multisequence magnetic resonance (MR) neuroimaging could affect the hearing threshold of healthy adults with earplugs and sponge mats as hearing protection. Materials and Methods With earplugs and motion-refraining sponge mats as hearing protection, 26 healthy young adults underwent 3-T MR neuroimaging imaging that included T1-weighted three-dimensional gradient-echo sequence, T2-weighted fast spin-echo sequence, diffusion-tensor imaging, diffusion-kurtosis imaging, T2*-weighted three-dimensional multiecho gradient-echo sequence, and blood oxygen level-dependent imaging. Automated auditory brainstem response (ABR) was used to measure the hearing thresholds within 24 hours before, within 20 minutes after, and 25 days after the MR examination. One-way repeated-measure analysis of variance with Bonferroni adjustment was used to compare automated ABR results among the three tests and partial η (η) was reported as a measure of effect size. Results Automated ABR results showed significantly increased mean threshold shift of 5.0 dB ± 8.1 (standard deviation) (left ear: 4.8 dB ± 9.2 [95% confidence interval: 1.09, 8.53], η = 0.221, P = .013; right ear: 5.2 dB ± 6.9 [95% confidence interval: 2.36, 8.02], η = 0.364, P = .001) immediately after the MR examination compared with the baseline study. This shift is below the temporary threshold shift of 40-50 dB that is associated with cochlea nerve changes. Automated ABR obtained at day 25 after MR imaging showed no significant differences from baseline (left ear: -2.3 dB ± 8.6 [95% confidence interval: -5.79, 1.78], η = 0.069, P = .185; right ear: 0.4 dB ± 7.3 [95% confidence interval: -3.35, 2.58], η = 0.003, P = .791). Conclusion A 3-T MR neuroimaging examination with the acoustic noise at equivalent sound pressure level of 103.5-111.3 dBA lasting 51 minutes can cause temporary hearing threshold shift in healthy volunteers with hearing protection. RSNA, 2017.

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Section: Alterations In Hearing Threshold Induced By Mr Imaging Acousmentioning

confidence: 73%

Temporary Hearing Threshold Shift in Healthy Volunteers with Hearing Protection Caused by Acoustic Noise Exposure during 3-T Multisequence MR Neuroimaging

Jin

et al. 2018

Radiology

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“…The SPP excited by this configuration is used in an experiment that reveals the potential of the technique in terms of absolute refractometric sensitivity in dilute gases. Here we rely on acoustically induced refractive index change sensing, as the latter requires an ultrahigh measurement resolution3031. We demonstrate that the SPP-matched resonances can detect an acoustic wave moving across the fibre grating.…”

mentioning

confidence: 99%

Ultrasensitive plasmonic sensing in air using optical fibre spectral combs

et al. 2016

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Surface plasmon polaritons (SPP) can be excited on metal-coated optical fibres, enabling the accurate monitoring of refractive index changes. Configurations reported so far mainly operate in liquids but not in air because of a mismatch between permittivities of guided light modes and the surrounding medium. Here we demonstrate a plasmonic optical fibre platform that overcomes this limitation. The underpinning of our work is a grating architecture—a gold-coated highly tilted Bragg grating—that excites a spectral comb of narrowband-cladding modes with effective indices near 1.0 and below. Using conventional spectral interrogation, we measure shifts of the SPP-matched resonances in response to static atmospheric pressure changes. A dynamic experiment conducted using a laser lined-up with an SPP-matched resonance demonstrates the ability to detect an acoustic wave with a resolution of 10−8 refractive index unit (RIU). We believe that this configuration opens research directions for highly sensitive plasmonic sensing in gas.

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“…Lang's group also pointed piezoelectric materials can precisely distinguish sound waves in low-to middlefrequency region. These features make them especially suitable for noise detection [32]. Furthermore, we have also previously reported that the piezoelectric electrospun PVDF plays a crucial role in absorbing sound at the low-frequency region [18,19].…”

mentioning

confidence: 89%