Masoud Motasaddi Zarandy
Mansoureh Adel Ghahraman
Executive Manager & Designer:
The Auditory and Vestibular Research Journal has been accepted for inclusion in Scopus. See Here.
Auditory and Vestibular Research is the official scientific quarterly double blind peer-reviewed publication of Tehran University of Medical Sciences, Iran. It is supported by Iranian Association of Audiology and Iranian Society of Otolaryngology, Head and Neck Surgery.
The aim of this journal is to provide the clinicians and researchers with the major clinical and basic science contributions in audiology. AVR provides readers with latest findings in clinical, educational, experimental, pediatric, geriatric, industrial, and rehabilitative audiology and auditory and vestibular neuroscience. It accepts original research papers in the form of full-length papers, letters to the Editor, reviews, and case-reports.
This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.
Authors do not need to pay an article-processing charge. Also Auditory and Vestibular Research have not article submission charges.
This journal is a member of, and subscribes to the principles of, the Committee on Publication Ethics (COPE).
Background and Aim: COVID-19 is a pandemic infectious disease caused by a novel coronavirus has made dramatic changes in people's individual, family, and social lifestyle. Most countries have implemented some regulations including wearing face masks, face shields, and gloves and physical, and social distance in public places to reduce the spread of the virus. However, these global recommendations may be associated with significant social, communication, and behavioral challenges for hearing-impaired people. This review explains the problems that hearing-impaired people may experience in the COVID-19 outbreak and also some helpful solutions that can be implemented by audiologists, healthcare professionals, and other members of the society that somehow interact with these people in such conditions that communication barriers increase.
Recent Findings: Recent findings indicate that wearing face masks, physical, and social distancing, e-learning and virtual communications during COVID-19 pandemic have provided some problems for people with hearing loss. This can, in turn, have negative consequences including increased feelings of loneliness, isolation and also some limitations in access to educational materials and rehabilitation training of lockdowns of schools and rehabilitation centers or some challenges of online learning at home.
Conclusion: People with hearing loss may experience problems during COVID-19 pandemic. There are some strategies that can be implemented to partially solve some communicative and social problems in this group. The use of transparent face masks, compensatory strategies, as well as optimization of virtual, and telehealth, telerehabilitation and tele-education services can be helpful for hearing-impaired people during this pandemic era.
Background and Aim: The acceptable noise level (ANL) assesses the noise that a person can tolerate during a running speech. Although it is a strong test, it has not yet become popular in clinical practice. One of the reasons is its contradictory results. Since it is a psychoacoustic test, psychological factors can affect its output. Investigation of these factors can provide more accurate results. This study aims to investigate the effects of noise and work-related fatigue on the ANL in normal-hearing people.
Methods: Participants were the male workers in the administration (n = 26) and production (n = 26) departments of an automotive manufacturing industry in Iran. They were evaluated before and after leaving the workplace in order to determine the effects of noise exposure, fatigue as well as their simultaneous effects on the ANL.
Results: In both groups, the ANL showed a significant increase after work compared to its level before work, and the background noise level (BNL) was significantly decreased. There was no significant difference in the BNL between administration and production groups before work. The most comfortable level (MCL) showed no significant increase. Moreover, the MCL changes were not significantly different in the production group compared to administration group, but the BNL and ANL changes were significantly higher.
Conclusion: Noise exposure and work-related fatigue affect the ANL. During the ANL test, earlier exposure to noise and the amount of fatigue should be controlled.
Background and Aim: It is not clear if the measurement of distortion product otoacoustic emissions (DPOAE) at frequencies above 8 kHz adds any value in determining the differences in the cochlear function between patients with and without tinnitus. This study aimed to compare DPOAE in the frequency range of 0.5−10 kHz in patients with normal hearing with and without tinnitus.
Methods: This comparative cross-sectional study was conducted on 20 individuals with tinnitus and normal hearing as a study group (SG) and a control group (CG) of 20 normal-hearing individuals without tinnitus. The DPOAE was measured with F1/F2 = 1.22 and intensities of F1 = 65 dB SPL and F2 =55 dB SPL in the frequency range of 0.5−10 kHz, moreover in the frequency of tinnitus in SG and corresponding frequency in CG.
Results: DPOAE level at 10 kHz did not differ significantly between SG and CG (p = 0.491). However, the mean of overall DPOAE level, DPOAE level at the frequency of tinnitus, and F2 values of 2.5, 5, and 6.298 kHz were significantly lower in SG than CG (p < 0.05).
Conclusion: Measurement of DPOAE at 10 kHz did not seem to add any value in determining the differences in the cochlear function between patients with and without tinnitus. However, decreased DPOAE levels at 2.5, 5, and 6.298 kHz which were observed among patients who have tinnitus and normal hearing, indicates some outer hair cells damage that was not detectable by conventional audiometry.
Background and Aim: Elderly people usually show poor performance in dichotic listening tasks. In this condition, the left ear being often the weaker one shows a performance below the normal limits. Studies have shown the effectiveness of dichotic listening training in auditory and language processing for adults and children with neurological disorders. This study aimed to develop a home-version of dichotic training and investigate its effectiveness in elderly adults.
Methods: Participants in this single-subject interventional study (AB design) were four elderly subjects (two males and two females) aged 65−75 years. The main inclusion criteria were dichotic listening deficit demonstrated by the dichotic digit test (DDT), no neurological or cognitive disorders, and normal hearing threshold. Dichotic listening training was performed with an informal home-version of dichotic interaural intensity difference (DIID) training program for seven weeks. DDT was performed seven consecutive weeks before (phase A) and after the intervention (phase B) at the end of each week.
Results: Data were analyzed by single-subject study statistics. Findings demonstrated an improvement in DDT scores for the left ear and decrease in right ear advantage scores in all the elderly adults after DIID training program. It seems that this training program could remediate poor performance in dichotic listening tasks in elderly people.
Conclusion: The advantage of this method is that it can be easily done at home and is cost-effective. However, further studies are needed to approve the neuroplasticity and structural changes in the brain after the DIID training program in this population.
Background and Aim: There are several prescriptive formulas for covering a variety of hearing loss, each of which applies relatively different amplifications at different frequencies. This study aims to compare the gains prescribed for digital behind-the-ear (BTE) hearing aids by the Desired Sensation Level Multi-Stage [Input/Output] (DSLm[I/O]), National Acoustic Laboratories-non linear2 (NAL-NL2) and manufacturer-specific formulas at different levels of input intensity.
Methods: The gain values in 12-channel BTE hearing aids prepared from four companies (Oticon, Phonak, ReSound and Siemens) were measured at three levels of input intensity (45, 65, and 85 dB SPL) and at a frequency range of 250−8000 Hz for two moderately severe flat and mild sloping to severe hearing losses by using the DSLm[I/O], NAL-NL2 and manufacturer-specific formulas in the Frye FP35 test box.
Results: There was no significant difference between the four selected hearing aids in terms of prescribed gain values using the prescriptive formulas (p > 0.05).
Conclusion: The DSLm[I/O] formula prescribes higher gain in the 12-channel BTE hearing aids from Oticon, Phonak and Siemens companies at all input intensities and frequencies for moderately severe flat and mild sloping to severe hearing losses compared to the NAL-NL2 formula and manufacturer-specific formulas (Voice Aligned Compression (VAC), Adaptive Phonak, Connexx Fit and audiogram+).
Background: Auditory neuropathy spectrum disorder (ANSD) in the auditory neural pathway can affect the auditory and speech development of children. Since the symptoms and complications of this disorder are similar in different children, hearing management and rehabilitation can help with better development of speech/language and hearing perception in children with ANSD.
The Case: In this study, the case was a one-year-old boy with ANSD and mild to moderate high-frequency sensorineural hearing loss. He first underwent various audiological examinations. Then, an aural rehabilitation program containing different auditory information and games was provided to him, his family, and caregiver at their home and in the rehabilitation center.
Conclusion: Although auditory neuropathy/dissynchrony in the auditory neural pathway has negative effect on the auditory and speech development, but the children with ANSD can use different inputs for language comprehension and acquisition if they receive effective education, especially auditory training at an earlier age.