ビデオヘッドインパルス検査所見における長期間パーソナルリスニングデバイスを使用した若年成人
Teja Deepak Dessai1,2,3, Jiss Mariya Sunny3, Rashmi J Bhat3
1Manipal Academy of Higher Education, Manipal, India.
Purpose:
The prolonged use of personal listening devices (PLDs) at high volumes may impact both hearing and balance. This study aimed to investigate whether high-volume PLD use leads to early vestibular changes detectable through the video head impulse test (vHIT) in normal-hearing individuals.
Methods:
A total of 100 participants aged 15-24 years with normal hearing and PLD use at >60% of the maximum volume were included. They were divided into two groups: control (>1 year of PLD use) and experimental (>1 year of PLD use). Output sound levels near the tympanic membrane were measured using the microphone-in-real-ear (MIRE) method, followed by vHIT assessment of all six semicircular canals. The parameters analysed included vestibulo-ocular reflex (VOR) gain, precision rate (PR) score, and covert saccades. The data were analysed via descriptive statistics and the Mann-Whitney U test.
Results:
The results revealed that the experimental group listened to significantly higher PLD output levels, but no significant differences were observed in the vHIT parameters between the groups.
Conclusions:
All findings remained within normal clinical limits. The results suggest that prolonged PLD use at moderately high volumes does not cause measurable semicircular canal dysfunction. However, continued promotion of safe listening practices remains essential for long-term auditory and vestibular health.
