The impact is going to be most clearly noted when the background-noise level goes up, when you have to focus on what someone is saying.

这种听力丧失的影响在背景噪音水平上升时表现的最明显，此时你不得不集中注意力才能听清楚某人的讲话。

youdao

The right level of background noise may interrupt our normal patterns of thinking just enough to allow our imaginations to wander, without making it impossible to focus.

适当水平的背景噪音可能会打断我们正常的思维模式，足以让我们发散想象力，而不会让我们无法集中注意力。

youdao

Since the results at 70 decibels were significant, the study also suggests that the right level of background noise—not too loud and not total silence—may actually improve one's creative thinking ability.

由于70分贝的噪音所产生的结果很明显，所以该研究还表明，适量的噪音环境——不太大声而不是完全寂静——实际上可能会提高一个人的创造性思维能力。

youdao

In the London area there's a constant low-level clacking noise in the background, reminiscent of the typing pools of yore.

BBC: Why air traffic control still needs the human touch

The essential ingredients of good open-plan office acoustics are evenly distributed sound-absorptive materials and a minimum level of background noise throughout.

BBC: The pleasures and perils of the open-plan office