What is the relationship between speaker signal to noise ratio and sound quality?

A higher signal-to-noise ratio indicates a better audio product, and a higher signal-to-noise ratio of a device indicates less noise it produces. For example, the signal-to-noise ratio of CD players can reach more than 90dB, and the high-end ones can reach more than L10dB.

The signal-to-noise ratio is also known as SNR or S N (signal-noise ratio). Refers to the ratio of signal to noise in an electronic device or electronic system. The signal refers to the electronic signal from outside the device that needs to be processed by the device, and the noise refers to the irregular extra signal (or information) that is not present in the original signal generated after passing through the device, and the signal does not change with the change of the original signal.

The same is that "the original signal does not exist" and there is another thing called "distortion", distortion and noise actually have a certain relationship, the difference between the two is that distortion is regular, and noise is irregular.

The unit of measurement of the signal-to-noise ratio is dB, which is calculated as 10 lg (ps pn), where ps and pn represent the effective power of the signal and noise, respectively, and can also be converted into the ratio relationship of voltage amplitude: 20 lg (vs vn), vs and vn represent the "effective values" of the signal and noise voltage, respectively. In an audio amplifier, what we want is that the amplifier shouldn't add anything extra than amplify the signal.

Therefore, the higher the signal-to-noise ratio, the better.

In a narrow sense, it refers to the ratio of the power of the output signal of the amplifier to the noise power output at the same time, which is often expressed in decibels, and the higher the signal-to-noise ratio of the device, the less noise it generates. Generally speaking, the higher the signal-to-noise ratio, the smaller the noise mixed in the signal and the higher the sound quality of the sound playback, otherwise the opposite is true. The signal-to-noise ratio should generally not be lower than 70db, and the signal-to-noise ratio of high-fidelity speakers should reach more than 110db.

The power of the speaker is the amount of power that can be withheld, and it has nothing to do with the sound quality. It has a great relationship with the power of the power amplifier. The sound quality of the speaker is good, and the power amplifier power is high, and the power amplifier power is large, and the sound quality is good.

The power of the speaker is not as big as possible,Applicable is the best,For ordinary family users20 square meters of pure middle or so room,The real sense60W power (refers to the effective output power of the speaker。

30w x 2)。

However, the larger the reserve power of the power amplifier, the better, preferably more than 2 times the actual output power. For example, if the speaker output is 30W, the power amplifier capacity should be greater than 60W, and for the HIFI system, the power amplifier power that drives the speaker is very large.

The sound power is large, that is, the volume is large, and the sound is transmitted far, which has little impact on the sound quality.

Of course, the quieter the better. Acoustic syndrome is caused by impairment of hearing function, resulting in hearing loss. Excessive sound volume is harmful to physical health, and too loud sound volume will affect people's hearing.

The most suitable volume range for the average human ear to listen to ** is between 40 60db, and it is more sensitive to medium and high frequencies**, and the ordinary audio volume only needs 5 10db to be felt by the human ear. In real life, some people blindly pursue the feeling of "fever" and turn the volume up to the earth, and as a result, such ** is not only not beautiful to enjoy, but also harmful to health.

Medical scientists believe that noise levels of 80db or more, continuous exposure for more than 8 hours are at risk of hearing damage. At a volume of 120 dB, the trigeminal nerve can cause significant pain due to strong sound pressure, and hearing damage can occur immediately. This is because the loud noise has an effect similar to that of ototoxic drugs on the cochlea, which damages the hair cells, the hearing peripheral receptors of the human ear.

In addition, powerful low-frequency shock waves can also damage the inner ear. The volume of the speaker also has an impact on human vision. Medical studies have shown that when the powerful ** noise emitted by the sound acts on the auditory organs, through the interaction of afferent nerves, it can also cause abnormal changes in visual function, thereby affecting vision.

In urban karaoke halls, concerts and other occasions, the noise intensity emitted by various speakers (stereos) can reach more than 100db. When people are exposed to this strong ** sound, they will have symptoms such as head swelling, tinnitus, tachycardia, irritability, memory loss, increased blood pressure, insomnia and dreams, nausea and vomiting and loss of appetite, which are very detrimental to health and longevity.

Of course, the quieter the better.

The value you mean is the ratio of the normal signal to the noise (the relationship between the denominator numerator), (signal noise, English s n): the higher the value, the smaller the noise.

Suppose the signal-to-noise ratio of one speaker is 90dB and the other is 100dB, the noise of the 100dB speaker is much smaller than that of the 90dB. In general, it can reach a signal-to-noise ratio of 60db, which can basically meet the requirements of use. Of course, the higher the better.

Now it is generally possible to achieve more than 90db.

The noise should be as small as possible, and the signal-to-noise ratio is the ratio of the useful signal to the noise, of course, the smaller the noise, the better, so that the signal-to-noise ratio is higher. The less noise you'll hear.

Summary. The effect of volume on the signal-to-noise ratio is significant. The signal-to-noise ratio (SNR) is a measure that describes the intensity ratio between a signal and noise, and it represents the difference in intensity between the signal and noise.

It can be thought that a higher signal-to-noise ratio means that the strength of the signal is higher than that of the noise, so that the signal can be received and transmitted more clearly. And the volume can change the strength of the signal and therefore affect the signal-to-noise ratio. If the volume is adjusted too high, the noise will be stronger than the signal, which will reduce the signal-to-noise ratio and cause the signal to be unclear.

The effect of volume on the signal-to-noise ratio is significant. The signal-to-noise ratio (SNR) is a measure that describes the intensity ratio between the bend of the signal and the noise, and it represents the intensity difference between the signal and the noise. The higher the signal-to-noise ratio, the higher the signal is stronger than the noise, so the signal can be received and transmitted more clearly.

And the volume can change the strength of the signal and therefore affect the signal-to-noise ratio. If the volume is adjusted too high, the noise will be stronger than the signal, which will reduce the signal-to-noise ratio and cause the signal to be unclear.

I'm sorry I don't understand, but can you elaborate on that?

Volume has a significant impact on the signal-to-noise ratio: high volumes increase noise and decrease the signal-to-noise ratio, resulting in an unclear signal.