Another hearing phenomenon that seems to be more noticeable with headphones is a decreasing sensitivity to sound levels over time, as the ears adapt to loud sounds.

另一个在耳机上比较明显的听觉现象是长时间聆听造成的听觉灵敏度下降。因为耳朵会适应大音量的声音；

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After the change of radio sensitivity higher sound more resonant more extensive use for MP3 player models such as by using headphones.

更改后的收音机敏捷度更高、声音更洪亮、用途更广泛，适合MP 3、单放机等机型所使用的耳机。

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After the change of radio sensitivity higher sound more resonant more extensive use for MP3 player models such as by using headphones.

更改后的收音机敏捷度更高、声音更洪亮、用途更广泛，适合MP 3、单放机等机型所使用的耳机。

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