The purpose of a balanced line is to transfer a "signal" from one place to another while rejecting "ground noise", which is not white noise or hiss, but power line related hum and buzz.

平衡传输线，是将信号从一个地方传到另一个地方的同时抑制“接地噪声”。

youdao

A pair will make noise as they program. A bullpen full of pairs will maintain a continual, low-level buzz.

双人在编程时会发出噪声，满是对子的大房间里总存在着低低的嗡嗡声。

youdao

It is a constant buzz and a constant noise you have to deal with.

VOA: standard.2010.06.14

Some analysts believe that the Apple TV would likely hit shelves in 2014 or 2015, while others point out that rumors of an actual TV set have been swirling since 2009, making all of the buzz and industry noise largely that: noise.

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There's fine line between "buzz" and "white noise", but you guys have definitely crossed it.

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