If you want to get a good voice, you may need to learn about pitch.

The level of the sound (treble, bass) is determined by the “frequency”. The higher the frequency, the higher the pitch (the frequency unit is Hz (hertz) Hertz, the human ear hearing range is 20 to 20000 Hz. The 20 Hz or lower is called the infrasound wave, and the 20,000 Hz or higher is called For ultrasound) For example, the sound of the bass end or a higher sound, such as a fine string sound. Generally, the earphones will have a frequency response curve. As shown in the figure below, the flatter the curve, the closer it is to the actual playback. The yellow curve of Beats is the obvious low-frequency distortion. Generally, the frequency response curve should be viewed together with the equal-tone curve. Most earphones have a low-frequency response at 1000-5000 Hz and a peak at 5000-10000 Hz. This is because people are particularly sensitive to 1-5 kHz sound. High-frequency sounds are not so sensitive. This will make the tri-band tuning more balanced, but due to individual differences, the sensitivity to tri-band is different.

Tri-frequency curve

(This picture comes from Tieba.baidu.com)

The headset should be the most distorted part of the entire hi-fi system. Other devices are quite small, such as high-fidelity turntables, decoding, and amp distortion.

The picture below is the frequency range of various sound sources. Through this picture, you can learn about various sound sources to make targeted tuning.

frequency range of various sound sources

(This picture comes from Tieba.baidu.com)