The scope of teleaudiology has been noted with telehealth due to Coronavirus disease (COVID-19) recently. As the notion has been around us for more than 20 years ever since 1999, it is necessary to perceive the knowledge accurately and prepare for the successful implementation of it. Therefore, the literature review including screening and diagnostic audiometry, cochlear implants and hearing aids, and aural rehabilitation, telecommunications technology regarding several fields of teleaudiology, and considerations for practicing were identified. Although overall internet-based audiological services showed benefits in terms of outcome and accessibility, uncertainties of cost-effectiveness, the optimal level of support, and a need for further studies of many aspects for teleaudiology has arisen. In the view of technology, the store-and-forward (asynchronous/hybrid) and a real-time (synchronous) methods were introduced with one applied and nine registered patents recorded from 2004 to 2020 for the invention of teleaudiology in the United States. Also, 10 checklists were suggested for planning teleaudiology practice from prior experience in hosting the teleaudiology program. Conclusively, it is hoped that this review sheds light on recognizing and improving the existing teleaudiology services and helps overcome the challenges faced in the era of pandemic and untact world to come.

BACKGROUND: Green algae (Chlorella spp.) has been widely used as a biofertilizer to improve the crop yield and quality. However, available information is not enough to verify the mechanism of green algae's beneficial impact on strawberry. This study was conducted to investigate the effect of Chlorella fusca CHK005 application on the growth and nutrient status of strawberry plant and fruit characteristics. METHODS AND RESULTS: A total of 800 seedlings of strawberry variety 'Kuemsil' were planted. Once a week, C. fusca culture solution (1.0 × 10 7 cells mL -1 ) was applied into soil via irrigation in four different concentrations: no application (control), 1/1000 times (× 0.5), 1/500 times (× 1), and 1/250 times (× 2). Result showed that growth of strawberry plant was enhanced by Chlorella application and the highest impact on fresh weight (FW) and chlorophyll content of the plants were observed in × 2 treatment, followed by × 1, × 0.5, and control treatments. The phosphorus (P) concentration in the plant was significantly higher in × 1 and × 2 treatments compared to control. In case of fruit quality, sugar content (°Brix), hardness, and FW were lowest in control, but these values increased as application levels of Chlorella were higher. Also, P and K contents in the fruits increased with increasing the application levels and significant correlation between P content and oBrix in the fruits was found. CONCLUSION(S): Overall, Chlorella application seemed to improve plant growth and fruit quality by increasing the utilization efficiency of P and K in strawberries.

Purpose: Enhancement of musical perception has a positive impact on the emotional stability, quality of life, and aural rehabilitation in individuals with hearing loss. In Korea, however, there are a few test batteries available for properly assessing their abilities to perceive music. The purpose of this study was to develop a evaluation material for the music perception ability, Assessment of Music Perception (AMP) considering the Korean culture and emotion.Methods: A total of 15 normal hearing adults (33.1 ± 11.4 years) were recruited. They performed the AMP which includes eight sub-tests: pitch, melody, rhythm, timbre, and harmony perception test, emotional reaction test, Music listening Attitudes and Satisfaction Questionnaire (MASQ), and Mismatch negativity (MMN).Results: The average percentage of correct answer was 94.0% ± 6.1% in pitch perception test, 94.0% ± 7.1% in melody perception test, 99.3% ± 1.8% in rhythm perception test, 78.9% ± 41.8% in timbre perception test, 96.7% ± 10.4% in emotional reaction test, 85.7% ± 14.1% in harmony perception test. The area of the negative waveform for MMN was 275.27 ± 225.65 μV·ms with the intensity of 70 dBnHL.Conclusion: Considering high scores of a instrument, a developed AMP could be applied for evaluating the music perception ability. However, a little bit of correction for each factor of materials is recommended for comprehensive AMP material. In the future, the music perception ability of the hearing impaired should be evaluated utilizing AMP.

Purpose: The ability of music perception should be improved for the hearing impaired by music training. The music training should be systematically conducted from each musical element to overall music listening based on analytic and synthetic approaches. This study aimed to develop the music rehabilitation program (MRP) to improve the music perception of the hearing-impaired.Methods: Fifteen cochlear implant (CI) users (34.5 ± 11.6 years) participated. The MRP consisted the musical elements such as pitch, melody, rhythm and timbre, and musical emotional training considering Korean culture. The MRP was conducted twice per week through self-directed home training for 2 months. The assessment of music perception (AMP) was tested before and after performing the MRP.Results: The results of AMP subtests were significantly different between pre- and post-MRP with 61.1% and 83.8% for the pitch perception test, 72.8% and 87.8% for the timbre perception test with Korean musical instruments, 48.0% and 59.3% with Western musical instruments, and 55.9% and 71.1% in the harmony perception test. However, there was no significant differences in the melody, rhythm and emotional reaction tests. According to the MRP effectiveness questionnaire, 80% of participants have changed their interests after training for listening to music.Conclusion: Although there were differences among elements of music training, the overall music perception ability was improved after conducting MRP (p < 0.001). In conclusion, providing a systematic music training program such as MRP could expand the range of music experience and improve the ability for music listening and for CI users.

Purpose: The music rehabilitation program (MRP) promotes auditory, language, cognitive, and motor development of the brain. The significance of MRP was studied through mismatch negativity (MMN) and Music Listening Attitude and Satisfaction Questionnaire for hearing loss (MASQ_H). Methods: Fifteen adult cochlear implant (CI) users (34.5 years; standard deviation, ± 11.6) participated. MMN was tested before and after MRP training at the stimulus intensity level of 70 and 100 dB hearing loss (HL). In addition, MASQ_H was utilized. Results: For the pre- and post-tests of MMN, the average amplitudes of the waveforms were -2.48 ± 1.95 µV and -6.11 ± 4.21 µV and the areas were 208.16 ± 211.59 µV·ms and 527.87 ± 360.42 µV·ms with the significant difference when the stimulus level was presented at 70 dB HL. For MASQ_H, 90.9% of the participants responded that they felt satisfied with listening to music using CI or hearing aid. When asked about the musical factors that were improved in the music listening, the ‘pitch perception’ and ‘timbre perception’ were responded showing increased satisfaction rates. Conclusion: This study confirmed that MRP improved language processing by facilitating auditory processing, cognitive ability, and neural plasticity of the central auditory system through the increased amplitude and area of MMN after MRP application. Furthermore, providing a systematic music training such as MRP could change the music listening attitudes and satisfaction of the CI users’. The active implementation of music rehabilitation is strongly suggested.