1. Subwoofer is a common name or abbreviation for everyone. Strictly speaking, it should be: subwoofer.

2. The function is mainly divided into two aspects:

(1) Tone

It mainly depends on the frequency and is also related to the sound intensity. The human ear responds to high-frequency sounds with high pitch and low-frequency sounds with low pitch. The change of pitch with frequency (Hz) is basically logarithmic. Different musical instruments play notes with the same frequency, and although their timbres are different, their tones are the same, that is, the fundamental frequency of the playing sound is the same.

(2) timbre

When different musical instruments play the same tone, their timbres can be completely different. This is because their fundamental frequencies are the same, but their harmonic components are quite different. Therefore, the timbre depends not only on the fundamental frequency, but also on the harmonics of the fundamental frequency, which makes each instrument and everyone have different timbre.

Extended data:

Functional function of subwoofer-dynamic:

The ratio of the strongest and weakest sound, expressed in dB. For example, the dynamic range of a band is 9dB, which means that the power of the weakest part is 9dB lower than that of the loudest part. Dynamic range is the ratio of power, which has nothing to do with the absolute level of sound. As mentioned earlier, the dynamic range of the human ear ranges from to 13dB. The dynamic range of various sounds in nature also varies greatly.

the language signal is only about 2 ~ 45dB, and the dynamic range of some symphonies can reach 3 ~ 13dB or higher. However, due to some factors, the dynamic range of the sound system rarely reaches the dynamic range of the band. The inherent noise of the recording device determines the weakest sound that can be recorded, while the maximum signal capacity of the system limits the strongest sound.

the dynamic range of sound signal is set to 1dB, so it is good that the dynamic range of audio equipment can be 1dB.

Baidu encyclopedia-subwoofer