Latest Events
Contact Us
Shenzhen Yasi Technology Co., Ltd. is a modern enterprise management enterprise integrating development, production and sales. Our products have...
Contact Now
Latest News

HKTDC Gifts & Premium Fair 2019

1.HKTDC Gifts & Premium Fair 2019 Booth No. :3G-B07 Time: 27th Arpil- 30th/April, 2019 Address: Hongkong COnvention Exhibition Centre, 1 Expo Drive, ...

HKTDC HK Electronics 2019 (Spring Edition)

HKTDC HK Electronics 2019 (Spring Edition) Booth No. 3E-C28 Time: 13th April-16th April, 2019 Address: Hongkong Cnvention Exhibition Centre, 1 Expo ...

The Unbearable noise

Have you ever encountered such a situation,whether you listen to music or watch a movie, the speaker will make some noise,and even do nothing, as long...

2018 Antumn Electronics Edition in Wanchai, Hong Kong

As we all know, Autumn Electronic Products Fair and International Electronic Components Fair in Wanchai, Hong Kong Trade and Development Council, 2018...

How to choose noise reduction headphones/ Earphones

Noise pollution has become more and more important. Business trips, daily trips, or work environments seem to make noise aside when we fall asleep. Si...

How to choose your own mini speaker

There are many people who originally bought the sound of blindly catching the tide and quickly found outdated and awkward to use, but because they did...

Material that affects the speaker quality

The mainparts of the speakers are the speakers, so what are the materials that affectthe sound quality of the speakers?There are several points to be ...

Study of machine exoskeleton breakthroughs

Engineers have developed a tight-fitting machine thatallows users to turn around when walking, which is the first time that thetechnology has the abil...
Bluetooth headset
Your position:  Home > News > newclass > What is the effect of speaker .....


What is the effect of speaker noise ratio on sound quality?

  • Author:James
  • Source:
  • Release Date:2016-12-01

Signal noise ratio is recognized as the audio industry to measure the quality of audio equipment is an important indicator of quality, almost all of the electro-acoustic equipment will be marked with this indicator, there is no indicator of the equipment, or some special equipment special equipment, or is not regular products.

SNR, the English name is called SNR or S / N (SIGNAL-NOISE RATIO), also known as the signal to noise ratio. Is the ratio of signal to noise in an electronic device or electronic system. The signal inside is the electronic signal from the outside of the device that needs to be processed by this device. The noise is an irregular extra signal (or information) that is not present in the original signal generated after passing through the device. The signal does not change with the original signal changes.

The signal-to-noise ratio is measured in dB, which is calculated as 10lg (PS / PN), where Ps and Pn represent the effective power of the signal and noise, respectively, and can be converted into the voltage amplitude ratio: 20Lg (VS / VN) , Vs and Vn represent the "rms" of the signal and the noise voltage, respectively. In an audio amplifier, it is desirable that the amplifier should not add anything other than amplify the signal. Therefore, the signal-to-noise ratio should be as high as possible.

Narrow sense refers to the amplifier output signal power and the noise power output at the same time, often with the decibels, the higher the signal to noise ratio of the equipment that it produces less noise. In general, the greater the signal to noise ratio, indicating mixed in the signal in the noise, the sound quality of the higher the playback, or vice versa. SNR generally should not be less than 70dB, high-fidelity speaker signal to noise ratio should reach more than 110dB.

Signal to noise ratio is not a fixed value, it should change with the input signal changes, if the noise is fixed, obviously the higher the input signal amplitude, the higher the signal to noise ratio. Obviously, this changing parameter can not be used as a measure, to make it a measure, it must become a fixed value. Thus, as a parameter of the equipment, the signal-to-noise ratio is defined as the ratio of signal to noise at the maximum undistorted output power of the device, so that the measurement of the signal-to-noise ratio of all the devices is united. Under the same measurement conditions were compared. Signal to noise ratio is usually not directly measured, but by measuring the amplitude of the noise signal conversion out, the usual method is: to the amplifier a standard signal, usually 0.775Vrms or 2Vp-p @ 1kHz, adjust the amplifier magnification (The distortion is determined by the manufacturer, usually 10% or 1%), write down the output amplitude of the amplifier at this time, and then remove the input signal to measure the noise present at the output at this time Voltage, recorded as Vn, and then according to SNR = 20lG (Vs / Vn) can calculate the signal to noise ratio. Ps and Pn are the effective power of the signal and noise, respectively. The signal ratio can also be calculated from SNR = 10lg (Ps / Pn).