Seol Hye-Yoon, Kim Seo-Hu, Kim Ga-Young, Jo Mini, Cho Young-Sang, Hong Sung-Hwa, Moon Il-Joon
Medical Research Institute, Sungkyunkwan University School of Medicine, Suwon 16419, Korea.
Hearing Research Laboratory, Samsung Medical Center, Seoul 06351, Korea.
Healthcare (Basel). 2022 Aug 2;10(8):1449. doi: 10.3390/healthcare10081449.
This study explores the influence of the noise-canceling technology in commercial earphones on sound pressure levels and preferred listening levels in terms of hearing protection.
Thirty individuals completed puretone audiometry and real-ear measurements to assess sound pressure levels at the level of the eardrum with and without the activation of the noise-canceling function. The Knowles Electronics Manikin for Acoustic Research was used to investigate the acoustic characteristics of two environmental sounds (bus and café). Two types of earphones (wireless and wired canal type) were utilized in the study.
For both bus and café noises, in the low-frequency range, sound pressure levels were significantly decreased for all types of earphones when the noise-canceling function was turned on. The same results were observed for the whole frequency range. In terms of preferred listening levels, the wireless canal type and wired canal type earphones showed significant reduction in volume levels.
The findings of the study show that for both low- and whole frequency range, the use of noise-canceling function significantly decreases the sound pressure levels of the signal for all styles of earphones, suggesting a potential of the noise-canceling technology in hearing protection.
本研究探讨商用耳机中的降噪技术在听力保护方面对声压级和偏好聆听水平的影响。
30名受试者完成了纯音听力测试和真耳测量，以评估在开启和关闭降噪功能的情况下鼓膜处的声压级。使用用于声学研究的Knowles电子人体模型来研究两种环境声音（公交车和咖啡馆）的声学特性。本研究使用了两种类型的耳机（无线和有线耳道式）。
对于公交车和咖啡馆的噪音，在低频范围内，当开启降噪功能时，所有类型耳机的声压级均显著降低。在整个频率范围内也观察到了相同的结果。在偏好聆听水平方面，无线耳道式和有线耳道式耳机的音量水平均显著降低。
研究结果表明，对于低频和整个频率范围，使用降噪功能可显著降低所有款式耳机信号的声压级，这表明降噪技术在听力保护方面具有潜力。
