The unit generates noise at all frequencies across the human hearing range.
它能产生所有频率的声音,覆盖了整个人类的听力范围。
The frequency response of human hearing system can be classified two categories: "static" and "dynamic".
本文认为人类听觉系统的频响有“静态”和“动态”之分。
All human beings lose their hearing to some extent as they grow older.
人上了年纪都会不同程度地丧失听力。
All human beings lose their hearing to some extent as they grow older.
人上了年纪都会不同程度地丧失听力。
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