It is a random signal power spectrum of the same unit. This is a good signal frequency and a theoretical construction, just like a full-color white light spectrum. White noise is full of vibration frequencies that can be heard by the whole human ear, which can help a person relax or sleep. Many people who have been treated with white noise describe them as the sound of rain, or the sound of waves beating against rocks, or the rustling of wind blowing through leaves, or the sound of mountains, waterfalls and streams. This kind of sound can play a certain role in sound therapy for people of all ages, and it is a kind of "harmonious" therapeutic sound.

Life is full of sound and noise interference, such as car horn honking, Wang Wanggou barking, neighbors snoring, alarm and shouting. White noise does not increase irritability, but it contains all sounds with the same frequency. Studies show that stable and peaceful sound flow, such as white noise, can filter and disperse noise, which is why it is used to help people relax and sleep.

White noise machine products on sale include sleep AIDS, privacy enhancers and tinnitus masking.

Architecture and communication science

One of the application fields of white noise is architectural acoustics. In order to reduce distractions and unnecessary noise (such as human conversation) in the internal space, continuous low-intensity noise is used as background sound.

White noise is also used in electronic communication. It is used directly or as the input signal of a filter to generate other types of noise signals, especially in signal synthesis, and is often used to reproduce signals with high noise components.

White noise is also used to generate impulse response. In order to ensure the balance effect of live concerts or other performances, instantaneous white noise or pink noise is emitted from the P A system, and noise signals are monitored in different places, so that engineers can automatically amplify or reduce some frequencies of building acoustic effects, thus adjusting the overall balance effect to obtain balanced harmony.

White noise can be used to test the frequency response of amplifiers or electronic filters, and sometimes it can also be used for microphones or automatic equalizers with flat response. The idea of this design is that the system will generate white noise, and the microphone will receive the white noise generated by the speaker, and then automatically equalize it in each frequency band to get a flat response. This system is used for professional equipment, high-end home stereo system or some high-end car radios.

What's the use of white noise?

One of its main uses is to check a system,

As a random signal in the future, "white noise" with limited bandwidth has equal weight frequency signals.

It is a good idea to use it to preliminarily evaluate the whole frequency band of the system!

If a system or structure has not withstood the test of "white noise", it is hard to say what it has done!

computer science

White noise is also used as the basis of some random number generators and is often used in the field of computer science.