Department of Otolaryngology, Vanderbilt University, Nashville, Tennessee.
Department of Otolaryngology, University of North Carolina, Chapel Hill, North Carolina, U.S.A.
Laryngoscope. 2021 Jan;131(1):25-27. doi: 10.1002/lary.28556. Epub 2020 Feb 10.
OBJECTIVES/HYPOTHESIS: To measure and report noise exposure at urban music venues and assess the risk of noise-induced hearing loss by comparing these measures to the National Institute of Occupations Safety and Health (NIOSH) guidelines.
Observational study.
A commercially available smartphone and external calibrated microphone were used to measure sound levels at urban music venues. The maximum sound level, equivalent continuous sound level, and statistical noise levels (L10, L50, L75, L90) were recorded.
The average equivalent continuous sound level was 112.0 (±4.9) dBA, and the average maximum sound level was 127.0 (±3.2) dBA. The L90 average (sound levels at or above this loudness for 90% of measured exposure time) was 101.1 (±5.5) dBA, and the L10 average was 115.2 (±5.0) dBA. Based off of NIOSH guidelines, noise exposure duration at the L10 average should not exceed 28 seconds, and those at the L90 average should not exceed 12 minutes.
Smartphone applications using external calibrated microphones can provide useful sound measurements. Data show that randomly sampled music venues may have noise levels that place patrons without hearing protection at risk for noise-induced hearing loss with prolonged exposure.
NA Laryngoscope, 131:25-27, 2021.
目的/假设：测量并报告城市音乐场所的噪声暴露情况，并通过将这些测量值与美国国家职业安全与健康研究所 (NIOSH) 指南进行比较，评估噪声性听力损失的风险。
观察性研究。
使用市售智能手机和外部校准麦克风测量城市音乐场所的声级。记录最大声级、等效连续声级和统计噪声级 (L10、L50、L75、L90)。
平均等效连续声级为 112.0(±4.9)dBA，平均最大声级为 127.0(±3.2)dBA。L90 平均值（测量暴露时间 90%以上的声级）为 101.1(±5.5)dBA，L10 平均值为 115.2(±5.0)dBA。根据 NIOSH 指南，L10 平均值的噪声暴露时间不应超过 28 秒，而 L90 平均值的噪声暴露时间不应超过 12 分钟。
使用外部校准麦克风的智能手机应用程序可以提供有用的声音测量值。数据显示，随机抽样的音乐场所的噪声水平可能会使没有听力保护的顾客在长时间暴露下有噪声性听力损失的风险。
无喉镜，131：25-27，2021。
