Some people like to work with the radio on for they think that a background noise may help them to concentrate.

有些人喜欢开着收音机工作，因为他们认为背景噪音可以帮助人们集中精力。

youdao

Each recording had a series of rhyming words that the volunteers had to identify for different levels of background noise.

每段录音都有一系列押韵的单词，志愿者们必须在不同程度的背景噪声下识别这些单词。

youdao

There was a scuffling noise in the background, which turned out to be mice.

背景中有窸窸窣窣的噪声，原来是有老鼠。

《柯林斯英汉双解大词典》

Idle noise was 35.1dBa, which was only a couple of dBs above background noise in the living room.

ENGADGET: How-to: Build a multi-talented HTPC for (roughly) $1,000

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

Just as grain size in silver halide film ultimately limits the amount of detail you can see in a photograph, the background noise produced by the sensor does much the same in digital imaging.

ECONOMIST: A die-hard analog photographer goes digital