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【速搜问答】降噪耳机是什么

问答 admin 5天前 17次浏览 已收录 0个评论

汉英对照:
Chinese-English Translation:

降噪耳机是指利用某种方法达到降低噪音的一种耳机。目前降噪耳机有两种分别为:主动降噪耳机和被动降噪耳机。

Noise reduction earphone refers to a kind of earphone which can reduce noise by some means. At present, there are two kinds of noise reduction earphones: active noise reduction earphone and passive noise reduction earphone.

降噪耳机是指利用某种方法达到降低噪音的一种耳机。目前降噪耳机有两种分别为:主动降噪耳机和被动降噪耳机。

Noise reduction earphone refers to a kind of earphone which can reduce noise by some means. At present, there are two kinds of noise reduction earphones: active noise reduction earphone and passive noise reduction earphone.

主动降噪功能就是通过降噪系统产生与外界噪音相等的反向声波,将噪音中和,从而实现降噪的效果。被动式降噪耳机主要通过包围耳朵形成封闭空间,或者采用硅胶耳塞等隔音材料来阻挡外界噪声。

The function of active noise reduction is to neutralize the noise by generating the reverse sound wave equal to the external noise through the noise reduction system, so as to achieve the effect of noise reduction. Passive noise reduction earphones mainly surround the ears to form a closed space, or use silicone earplugs and other sound insulation materials to block the external noise.

分类介绍

Classification introduction

耳机降噪的方法有两种,主动降噪和被动降噪。

There are two noise reduction methods for headphones, active noise reduction and passive noise reduction.

主动降噪功能就是通过降噪系统产生与外界噪音相等的反向声波,将噪音中和,从而实现降噪的效果。主动式降噪耳机带有与外界噪声抗衡的降噪电路它们大部分采用体积较大的头戴式设计,可利用耳塞棉和耳机外壳等构造阻挡外界噪声,进行第一轮隔音,同时也为了有充足的空间安装主动降噪电路以及电源。

The function of active noise reduction is to neutralize the noise by generating the reverse sound wave equal to the external noise through the noise reduction system, so as to achieve the effect of noise reduction. Active noise reduction earphones are equipped with noise reduction circuits that can compete with external noise. Most of them are of large volume and can be used to block external noise by using earplug cotton and earphone shell for the first round of sound insulation. At the same time, active noise reduction circuit and power supply are installed in order to have sufficient space.

被动式降噪耳机主要通过包围耳朵形成封闭空间,或者采用硅胶耳塞等隔音材料来阻挡外界噪声。由于噪声没有经过降噪电路芯片处理,一般只能阻隔高频噪声,对低频噪声降噪效果不明显。

Passive noise reduction earphones mainly surround the ears to form a closed space, or use silicone earplugs and other sound insulation materials to block the external noise. Because the noise has not been processed by noise reduction circuit chip, it can only block high-frequency noise, and has no obvious effect on low-frequency noise.

降低噪音通常所采用的三种降噪措施,即在声源处降噪、在传播过程中降噪及在人耳处降噪,都是消极被动的。为了积极主动地消除噪声,人们发明了“有源消声”这一技术。它的原理是:所有听到的声音都是声波,都有一定的频谱构成。如果可以找到一个声波,其频谱与所要消除的噪声幅值相等,相位刚好相反(相差 180°),两者叠加就可以将噪声完全抵消掉。关键就在于如何得到那抵消噪声的声音。实际采用的办法是:从噪声本身着手,用麦克风监听噪声,再设法通过电子线路产生一个反向声波并通过扬声器播放出来。由此看来,有源消声这一技术实际上是“以毒攻毒”。

The three noise reduction measures commonly used to reduce noise, namely, noise reduction at the sound source, noise reduction in the process of transmission and noise reduction at the ear, are all passive. In order to eliminate the noise actively, people invented the technology of “active noise reduction”. Its principle is: all the sounds heard are sound waves and have a certain spectrum composition. If a sound wave can be found, its spectrum is equal to the noise amplitude to be eliminated, and the phase is just opposite (the difference is 180 °), the noise can be completely eliminated by the superposition of the two. The key is how to get the noise canceling sound. The actual method is: start with the noise itself, monitor the noise with microphone, and then try to generate a reverse sound wave through the electronic circuit and play it through the loudspeaker. From this point of view, the active noise reduction technology is actually “attacking poison with poison”.

在应对复杂噪声环境时,“主动降噪”的两枚 MEMS 麦克风将会分别拾取耳内噪声及多样外界环境噪声,配备独立运作的智能高清降噪处理器,对拾取的不同噪声进行高速运算,精准消噪。并且针对不同场景的降噪需求,耳机提供多种聆听模式:强、弱两档主动降噪模式和一种环境音模式。不同程度隔绝外界噪声,消除常见降噪耳机聆听时的“黑洞感”。

When dealing with complex noise environment, the two MEMS microphones of “active noise reduction” will pick up the internal noise in ear and various external environment noise respectively, and will be equipped with an independent intelligent high-definition noise reduction processor to carry out high-speed calculation and accurate noise elimination for different noises picked up. According to the noise reduction requirements of different scenes, the headset provides a variety of listening modes: strong and weak active noise reduction mode and an ambient sound mode. Different degrees of isolation of external noise, eliminate the common noise reduction earphone listening “black hole feeling”.

应用原理

Application principle

降噪耳机,采用主动噪音控制,不同于一般耳机的被动隔音。其原理为:

Noise reduction earphone adopts active noise control, which is different from the passive sound insulation of ordinary earphone. The principle is as follows:

1. 先由安置于耳机内的讯号麦克风侦测耳朵能听到的环境中低频噪音 (100 ~ 1000Hz)

1. The signal microphone installed in the earphone detects the low-frequency noise (100-1000HZ) in the environment that the ear can hear

2. 再将噪声讯号传至控制电路,控制电路进行实时运算

2. The noise signal is transmitted to the control circuit for real-time operation

3. 通过 Hi-Fi 扬声器播放与噪音相位相反、振幅相同的声波来抵消噪声

3. The hi fi loudspeaker plays the acoustic wave with the opposite phase and the same amplitude as the noise to cancel the noise

4. 叠加后噪声消失听不见了

4. The noise disappears after superposition

适用人群

intended for

首先是商务人士。由于经常出差,特别是每天往返于不同城市之间的商务人士,他们一定最讨厌机舱中的噪声,如果有一款降噪耳机的话,一定能够远离这些噪声,同时还能够通过欣赏音乐来进行放松。

First, business people. Due to frequent business trips, especially business people who travel between different cities every day, they must hate the noise in the cabin. If you have a noise reduction headset, you can definitely stay away from the noise and relax by listening to music.

当然还有地铁族们。天天挤地铁的上班族,对于地铁里的噪声恐怕是早已习以为常了,不过这时候如果能有一副降噪耳机,不仅能够远离噪声的打扰,同时还能够通过耳机来调整心情,开开心心享受这个过程。

Of course, there are subway people. Office workers who squeeze into the subway every day may be used to the noise in the subway. However, if you can have a set of noise reduction earphones, you can not only stay away from the noise, but also can adjust their mood through the headphones and enjoy the process happily.

办公室一族也很需要一副降噪耳机。有时候在思考策划方案的时候,听着中央空调运行的声音特别心烦,而如果此时身边有同事不停在交头接耳,则更是烦。此时不妨戴上一副降噪耳机,在优美的音乐中扩展思路吧。

Office workers also need a pair of noise reduction headphones. Sometimes when thinking about the plan, listening to the voice of central air conditioning operation is particularly upset, and if there are colleagues around constantly whispering, it is even more annoying. At this point, you might as well put on a pair of noise reduction earphones and expand your ideas in the beautiful music.


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