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Clinical Applications of Frequency-Following Response in Children and Adults
Published in Stavros Hatzopoulos, Andrea Ciorba, Mark Krumm, Advances in Audiology and Hearing Science, 2020
Milaine Dominici Sanfins, Stavros Hatzopoulos, Maria Francisca Colella-Santos
It is important to note that the FFR should be elicited by moderate or high-intensity sounds. It is recommended that the level of the sound stimuli is 40–45 dB above the auditory threshold. During the assessment, the intensity should be in an audible and comfortable intensity around 80 dB SPL (Sanfins and Skarzynski, 2017; Sanfins et al., 2018). FFR responses have been recorded at various sound pressure levels (60–85 dB SPL) in normal-hearing listeners and at 70–95 dB SPL in cases presenting sensorineural hearing loss, however, care was taken to ensure that the maximum stimulus level in either group was below the uncomfortable loudness level (Ananthakrishnan et al., 2016). An important point about FFR is that high-frequency stimulation seems to produce a greater amount of noise; thus, the stimulus frequency should not exceed 2000 Hz.
Chronic Hyperglycemia Impairs Vision, Hearing, and Sensory Function
Published in Robert Fried, Richard M. Carlton, Type 2 Diabetes, 2018
Robert Fried, Richard M. Carlton
A number of reports have now confirmed the link between diabetes and hearing impairment (hypoacusia) (Vesperini, Di Giacobbe, Passatore et al. 2011; Cowie, Rust, Byrd-Holt et al. 2006). Some studies have shown that the magnitude of hearing loss in patients with diabetes is related to the duration of the disease and age, and affects principally the auditory threshold to high frequencies. (See below.)
Auditory sensitivity
Published in Stanley A. Gelfand, Hearing, 2017
It is not uncommon to experience a period of decreased hearing sensitivity, which lasts for some time, after being exposed to high sound intensities, for example after leaving a rock concert. This temporary shift in auditory threshold may last as long as roughly 16 h or more, improving gradually. The phenomenon is quite descriptively called temporary threshold shift (TTS) or post-stimulatory fatigue.
Hearables, in-ear sensing devices for bio-signal acquisition: a narrative review
Published in Expert Review of Medical Devices, 2021
Colver Ken Howe Ne, Jameel Muzaffar, Aakash Amlani, Manohar Bance
Hearable devices have also shown considerable synergies with hearing aids. Some of the proposed devices were manufactured in the shape of a hearing aid for better anchoring to the ear [49]. This opens the possibility of integrating sensors within current hearing aids to enable physiological signal monitoring in hearing impaired individuals [25]. Ota, et al. [29] demonstrated a similar concept, presenting a device that could record tympanic temperature and function as a bone conduction hearing aid simultaneously. Moreover, Christensen, et al. [98] reported a device that utilized ear-EEG to estimate auditory threshold levels in individuals with sensorineural hearing loss, concluding that with further refinements, it could be possible for a device that could automatically alter its auditory processing according to progressive hearing loss of its user. Other possible synergies include BCI applications such as autonomous audio steering, which can improve hearing in background noise by controlling the direction of hearing aid sound amplification based on user brain activity [99].
Auricular reconstruction using Medpor combined with different hearing rehabilitation approaches for microtia
Published in Acta Oto-Laryngologica, 2021
Chenyan Jiang, Chen Zhao, Bin Chen, Lixin Lu, Yuxin Sun, Xiaojun Yan, Bin Yi, Hao Wu, Runjie Shi
Congenital microtia-atresia affects patients in two specific ways: severe conductive hearing loss and difficulty in integrating into social environments due to auricle malformation [7]. Resolution of microtia-atresia therefore requires both hearing rehabilitation and appearance improvement [8]. These comparatively independent but interconnected procedures increase the operation time and suffering for patients. Normally, the combined procedure needs approximately 1 year for completion and at least two operations under general anaesthesia [9,10], by using approach to the middle ear and external auditory canal following auricle reconstruction so that the vascular supply essential for implanting the costal cartilage graft is not compromised. In the present study, we demonstrate a combined strategy to obtain both auricle reconstruction with Medpor framework and hearing restoration in a one-stage operation design; this strategy has significant advantages in terms of less time of operation, short treatment span, and less extent of suffering due to anaesthesia and incisions for patients. After a follow-up for 12 months, no severe complications were observed, and the auditory threshold improved from 4.13 dB to 43.33 dB. The outcome in terms of auricular shape symmetries and fine structures showed no large difference among the three groups; this indicated that the combined procedure is a feasible, safe, and efficient surgical design for patients with microtia-atresia.
Early detection of hearing impairment in type 2 diabetic patients
Published in Acta Oto-Laryngologica, 2020
Yanhong Li, Bo Liu, Jin Li, Lingyu Xin, Qian Zhou
Although, HFA has been applied to the early hearing function evaluation of many diseases, only one paper evaluated the application of HFA in type 2 diabetic patients and its conclusion was consistent with us. But, the criterion about hearing loss of 9k–16k Hz was different from us. They define hearing impairment if pure tone thresholds were above 25 dB HL [12], While, in our study the average auditory threshold higher than that of the control group was thought as hearing loss. Actually, ISO has published the standard references in the 8k to 16k Hz frequency range, whereas, with lots of limitations. First, they were limited to a small number of specific earphones. Second, they are not age or gender specific, whereas, the high frequency hearing threshold was related to age and frequency. Third, they only include subjects aged between 18- and 25-years old [13]. Therefore, the applicable standard references of HFA still need lots of studies.