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在过去几年中,随着数字技术的采用,音频领域,特别是娱乐工业,发生了巨大的变化。以小型激光唱片(CD唱片)作为第一个数字化媒介,录音质量大为提高,以致所有其他的音频设备都要逐渐加以改造,以便适应这种改善了的质量水平。0.1%的失真,在模拟录音中算得上优良了,但对小型激光唱片来说,却是抱怨的原因。为了保证可靠地测量质量如此之高的数据,(这当然不应当仅仅是样本中未加证实的声称),不得不把测量仪器的能力推到其理论上的极限。这就是开发UPA4型音频分析仪(图1)的理由,它是众所周知的UPA型音频分析仪的后继者。失真仪的改进以及
In the past few years, with the adoption of digital technologies, great changes have taken place in the audio field, especially in the entertainment industry. With compact discs (CDs) as the first digitizing medium, recording quality has improved so much that all other audio equipment needs to be gradually modified to accommodate this improved quality. 0.1% of the distortion, in the analog recording is considered good, but for small compact discs, but it is the reason to complain. In order to ensure reliable measurement of such data of a very high quality, which of course should not merely be unconfirmed claims in the sample, the ability of the measuring instrument to be pushed to its theoretical limit. This is why it developed the UPA4 audio analyzer (Figure 1), the successor to the well-known UPA audio analyzer. Distortion instrument improvements as well