1, subwoofer

20Hz-40Hz, with strong sound when appropriate. Can control thunder, bass drum, organ and bass. Excessive ascension will make music turbid.

2. Bass

40Hz- 150Hz is the basic part of sound, and its energy accounts for 70% of the whole audio energy, which is an important part of expressing music style. When appropriate, the bass is relaxed and the voice is full and soft. When it is insufficient, the voice is low, 150Hz. When it is raised excessively, it will make the sound dull, reduce the brightness and enhance the nasal sound.

3. Bass

150Hz-500Hz is the structural part of sound, and the human voice is located in this position. When it is insufficient, the singing voice will be drowned out by the music, and the voice will be very soft and weak. When it is properly lifted, it will feel energetic and powerful, and improve the intensity and loudness of the sound. Excessive lifting will make the bass stiff, and the excessive lifting will be 3-6dB at 300Hz. If reverberation is added, the clarity of sound will be seriously affected.

4, alto

500Hz-2KHz, including the lower harmonics and overtones of most instruments, is the characteristic sound of snare drum and percussion instruments. The sound is clear and bright when it is appropriate, and hazy when it is insufficient. Excessive lifting will produce a sound similar to a telephone.

5. Tenor

2KHz-5KHz, which is the characteristic sound of the strings (the friction sound between the bow and the strings when pulling the strings, and the sound of fingers touching the strings when playing music). When it is insufficient, the sound penetration will be reduced, and when it is too strong, it will cover up the recognition of language syllables.

6. High notes

7KHz-8KHz is the frequency that affects the sound layering. Excessive promotion will make piccolo and flute sound prominent, the tooth sound of language will be aggravated, and the timbre will be hairy.

7, extremely high voice

8KHz- 10KHz, when appropriate, the metal permeability of triangle iron and vertical * is high, and the rhythm of sand clock is clear and recognizable. Excessive lifting will make the sound unnatural and easily burn out high-frequency units.

Need to know:

The equalizer was invented in the 1930s to correct the lack of sound. Its main use is in Hollywood film studios. Thanks to the support of an equalizer called fidelity filter, it has achieved good results in long-distance sound reinforcement, which is helpful to popularize its application and also leads to subsequent abuse.

Because several generations of sound engineers know little or nothing about the influence of equalizer on sound, it is not surprising that the sound produced by equalizer is not satisfactory in this case.

Equalizers are used to mix the input channels and the wiring equipment of the mixer, for example, on the output line leading to the speaker. Although the use of equalizer in microphone input channel reminds us of its method of shaping the sound of speakers or musical instruments, the question that is often overlooked is whether an equalizer is needed, which may be a sign of errors in other links.