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噪声是有颜色的吗?

Can Noise Have Color?

You may have heard the phrase “white noise”
也许你听过“白噪声”这个词
What does it mean?
但你知道它是什么意思吗?
When there’s a lot of different sound signals at once
当许多不同的声音信号同时存在时
we often consider it “noise”.
我们一般称之为“噪声”
Noise has an inherent randomness.
噪声本身具有随机性
It’s a mix of unpredictable signals.
是不可预测的信号的混合
But there are different varieties of noise, patterns within that randomness.
但噪声也各种各样 有不同的随机模式
When a cat makes that “ssssss” sound,
当一只猫发出“嘶嘶”声时
zillions of air molecules
无数的气体分子振动
create sound across a broad range of frequencies.
发出一种频率覆盖范围很广的声音
We call it “white noise” because it has basically equal power
我们称它为“白噪声”
from all frequencies of audible sound,
因为它的强度在可闻音的所有频段上大致相等
just like white light has equal power from all frequencies of visible light.
这就类似于白光在可见光的每个频段强度相等
And just as we call different frequencies of light different colors,
正如我们以不同颜色命名不同频率的光
we call different mixes of sound frequencies different colors of noise.
我们以不同颜色的噪声区分不同的声频组合
We use our mouths to make a sound: “shhhhhhh”.
当我们用嘴发出“嘘嘘”声时
We get pink noise.
就能得到粉红噪声
Pink noise is shaded more towards the low end of the spectrum.
粉红噪声低频率段的能量更高
That makes it a popular choice for people looking for background noise
很多想要防止注意力分散 或者寻求放松的人
to drawn out of distractions, or to help them relax.
会选择粉红噪声作为背景音
Although white noise has a flat spectrum,
虽然白噪声的频谱很平滑
it can sound a little jarring and high pitched.
但它听起来有点刺耳而且音调较高
That’s because our ears are more sensitive to the higher frequencies,
这是由于我们的耳朵对高频声音更敏感
so they feel louder.
所以白噪声听起来声音更大
Pink noise may be more soothing
而粉红噪声可能听起来更舒缓
because it boosts lower frequencies, so it sounds more natural.
因为它低频声段较强 所以听起来更自然舒适
And it’s similar to the background noise of our mother’s womb,
此外粉红噪声很像母亲子宫中的背景音
a loud, low rumble,
强大而低沉的隆隆声
a comforting sound of life itself.
一种令人舒适的生命之音

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视频概述

声音可以根据频率不同被分为不同的音色,如频率范围较广但略微刺耳的白噪音和舒缓的粉噪音等

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视频来源

https://www.youtube.com/watch?v=moEgZYrazdc

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