Unverified82% confidenceFactTime unknown
厂标信噪比/失真数据要看测试条件：≥120dB SNR和＜0.0005% THD+N属优秀，但需确认是A计权及满功率下实测；'满血'指标常在无负载或1kHz下测，实际带耳机负载会下降
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Unverified失真指标看THD+N应＜0.01%，SNR信噪比≥110dB为优秀水平，但这些客观指标达标后进一步提升对听感影响很小，不必盲目追求数字极致86% similarUnverified信噪比(SNR)≥120dB且THD+N<0.001%属Hi-Fi级，游戏娱乐用114dB足够；低于108dB的廉价内置卡底噪明显，接高灵敏度入耳会有电流声82% similarUnverified信噪比看有权重条件：厂商标注SNR需注明是否A计权及参考电平。真正衡量前级底噪应关注在实际增益下的输出噪声，纯前级因电路简单，优秀型号残余噪声可低于-100dBu，但被动前级噪声理论上最低（近乎只有讯源本底）81% similarUnverified看动态范围（DNR）而非只看采样率：DNR≥120dB属于优秀水平，≥115dB足够日常听感干净，本底噪声决定安静段落是否有底噪嘶声，比32bit/768kHz这类营销参数更影响实际听感80% similarUnverified过滤降噪耳塞的降噪值应看SNR或NRR，通勤/办公选SNR 18-22dB即可保留人声与广播提示音；工业/射击场景需SNR≥26dB或NRR≥2878% similar
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