Many fields involve "high and low frequencies", that is, high and low frequencies, but generally refer to various physical oscillations, many of which may be vibrations such as current, particles and electromagnetic fields. The description of "high frequency and low frequency" leads to different results.
In a circuit, inductors have different resistances (usually called barrier layers) to currents of different frequencies, while capacitors have similar characteristics.
Generally, bass equalizer is divided into: low-frequency system 50 ~ 300 Hz, middle-low frequency system 300 ~ 1250 Hz, intermediate frequency system 1250 Hz ~ 3300 Hz, and intermediate frequency system 3300 Hz ~ 6500 Hz and above.
Characteristics of each frequency band:
High frequency and high frequency low section:
8k- 10ks tone;
6K-8K-8 k brightness and transparency, enhance heavy tooth sound and dim landing sound;
The clarity of 5K-6K language is improved, and the voice is sharp and easy to get tired.
Intermediate frequency:
1K-2K is transparent and smooth, with a sense of jumping and loose landing;
800 strength to improve the throat;
500- 1K vocal pitch and sound contour, improve the sense of sound prominence and landing sound contraction;
300-500 voice tonic area, improve voice monotonicity, landing sound hole;
Low frequency:
100- 150 plump, enhance muddy and thin landing;
60- 100 strong sense, enhance roar (boom) and landing weakness;
20-60 sense of space, enhance low-frequency vibration (buzzing) and landing inspiration;
Extended data:
Frequency classification
1, power frequency
China uses sinusoidal alternating current with a frequency of 50 Hz or 50 cycles per second. The frequency of alternating current is an industrial term for working frequency. 20 13 the world power system has two frequencies, one is 50 Hz and the other is 60 Hz.
2. Audio
Sound is a kind of mechanical vibration, which can spread through various material states. These materials that can transmit sound are called media. Sound cannot travel in a vacuum.
The frequency range of human hearing is about 20 ~ 200 Hz. Anything beyond this range is imperceptible to the human ear. Infrasound is less than 20Hz, and ultrasonic is more than 20 Hz. The higher the sound frequency, the higher the pitch, the lower the sound frequency and the lower the pitch.
3. Tidal frequency
In astronomical tide science, it is inconvenient to display celestial bodies in Hertz because of the long period of celestial activity. The commonly used frequency unit is CPH, that is, the period of every hour. If the most common tidal period of M2 is about 12.422h, its frequency is usually expressed as 0.0805 1cph.
Baidu Encyclopedia-High Frequency and Low Frequency
Baidu Encyclopedia-Frequency