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Tour User Guide - B&H Photo · 2015-10-15 · 再逐漸調高音量,直到達到舒適的聆聽水平。噪音等級以分貝 (dB) 衡量,暴露於 85 dB 或更 高噪音會導致逐漸聽力受損。請監督您的使用情況,聽力受損是響度相對於時間的一個函數。
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