Collaborative filtering works only as well as the data it has available, and humans produce noisy, low-quality data.

“协同筛选”的工作仅仅针对所有可用的数据，而人类却是制造那些杂乱无章、低质量数据的始作俑者。

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When switching low impedances, shielding needs are minimal. Shielding is generally needed only in electrically noisy environments.

在切换低阻时，屏蔽要求是最低的。通常只有在电噪声丰富的环境下才需要屏蔽。

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Accelerometer readings can be jerky and noisy. Applying low-pass filtering on the signal allows you to smooth it and get rid of high frequency noise.

加速度传感器数值可能被颠簸和噪音影响。应用低通过滤器在信号上可以是它平滑，并摆脱高频噪音的干扰。

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But listening to the audio CAPTCHA again just a few seconds later, numbers began to emerge from the noisy mess, spoken by a mix of high and low voices.

FORBES: Identity Theft