Stereo audio - test the separation of left and right channels of speakers and headphones

Stereo audio - test the separation of left and right channels of speakers and headphones

When playing on a mobile phone, you must wear headphones to listen to it.

Directly use the built-in speaker of the mobile phone to play, why can’t you hear the sound quality with a high degree of restoration? The main reasons are as follows:

1. Considering the portability of the mobile phone, the size and weight are made smaller. The speaker only accounts for less than one-twentieth of the volume of the mobile phone. With such a small size, it is impossible to produce the same sound effect as the home audio;

2. Some people may ask, the earphone is also small in size and light in weight, why is the sound quality better than that of the mobile phone speaker? That's because earphones and mobile phone speakers are designed with different materials and main purposes. Headphones are suitable for listening to full-frequency music at close range, so they can only guarantee the listening effect at close range. If it is not feasible to use it as a ringtone for incoming calls, the ringtone will not be heard if it is a little further away. The main purpose of mobile phone speakers at the beginning was to play incoming calls and message ringtones (do you still remember the black-screen mobile phones such as Nokia before the appearance of color-screen mobile phones? They didn’t even have the function of playing music, color ringtones, and polyphonic ringtones). If you let the mobile phone speakers play music, as you usually hear, except for the loud high-frequency sounds, the low-frequency sounds are almost inaudible, such as drums and bass sounds. Therefore, if you want to have good sound quality, the caliber of the speaker is the key, especially the low frequency. The kind of speakers sold online that can be easily held by one hand, the merchants are boasting about how good the effect of this subwoofer is. In fact, the bass effect can only guarantee a little feeling at close range, so don’t have too high expectations.

If you use a home stereo to play, it is best to keep a distance of more than two meters between the left and right speakers, and the effect will be better.

Experiments on how humans hear sound with both ears show that more realistic sound reproduction methods are achievable.

Stereo separation indicates the degree of isolation between the left and right channels in a stereo system, and it actually reflects the degree of crosstalk between the left and right channels. If there is a lot of crosstalk between the two channels, the three-dimensionality of the reproduced sound will be reduced.