Unverified90% confidenceDecision RuleTime unknown
耳温枪测量精度应符合ISO 80601-2-56标准，误差范围需≤±0.2℃（35~42℃区间），选购时查看是否有该医疗器械认证标注
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Unverified精度与价格呈强正相关：Class 2普通声级计测量范围通常30-130dB足够居民环境，追求更宽量程（如20-140dB）和更高精度会显著加价，普通家庭噪音多在40-90dB区间，无需为极端量程买单68% similarUnverified判断吸音箱真实性能可看是否标注NRC（降噪系数）或吸声频率曲线，标注NRC≥0.7且覆盖500Hz-2kHz人声频段的产品比只标'吸音棉'的更可信67% similarUnverified维权/取证用途需选精度等级达IEC 61672 Class 2及以上的声级计，Class 1精度更高但价格贵一倍，普通居民噪音投诉Class 2（±1.4dB）已满足环保部门认可标准66% 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≥2866% similar
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