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Because normally the electro-acoustic equipment, technical specifications are given quasi-average noise level, rather than quasi-peak noise level, this should be noted.
因为通常电声设备技术指标给出的是噪声准平均值电平，而不是噪声准峰值电平，这一点应加以注意。
The high fidelity meaning is refers to the audio frequency electro-acoustic system and the equipment or the part maintains the sound signal original appearance ability.
高保真的意思是指音频电声系统及其设备或部件保持声音信号原来面貌的能力。
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