【 Weak current College 】 Equalizer using skills---Power By 【 China power house network 】

Because the room resonance characteristics of sound-absorbing materials, and the frequency of the sound absorption coefficient of different and speaker system is not uniform frequency response of a cause, cause certain frequency sounds too strong and certain frequency sound. It is necessary to the room's frequency response. Room equalization has two methods: results of the human ear listening, difficult, difficult to master, you must have a wealth of practical experience and very familiar with the program source, and adjust the size of the sound pressure level, and listen man's age is also relevant. Another method is to use pink noise source and audio spectrum analyzer for objective measurement and adjustment. 1. Equalizer adjustment method: subwoofer: 20Hz-40Hz, appropriate sound strong. Control of Thunder, bass drum, organ and bass sound. Excessive lifting will make music become cloudy. Bass: 40Hz-150Hz, is part of the basis of sound, its energy accounted for the entire audio energy of 70%, is the performance of the musical style of important ingredients. Where appropriate, the bass sound relaxation properly, when you full soft enough, sound thin, excessive lifting 150Hz will make the sound from a dull, luminance drops, nasal sound enhancement. Bass: 150Hz-500Hz, is part of the structure of the voice, the voice at this location, is low, the sound of singing will be inundated with music, sound, soft but unable to find the right upgrade is thick and strong, increasing the intensity and loudness of the sound. When upgrading over the bass becomes stiff, excessive lifting 300Hz Department 3-6dB, if coupled with reverb, it will seriously affect the clarity of the sound. Baritone: 500Hz-2KHz, contains most of the musical instruments of low harmonic and overtone, Xiaojun drum and percussion instruments is the feature code. Appropriate sound thorough bright, insufficient sound obscure. Excessive lifting will produce similar phone voice. Treble: 2KHz-5KHz is string feature codes (La musical bow and string of friction and noise, plucking the strings of your fingers touch the music sounds a). Insufficient sound penetrating power drops, too strong when the masking language syllable recognition. Treble: 7KHz-8KHz is the frequency of the sound level. Excessive increase makes the Piccolo, flute sound, language pronunciation of teeth and timbre nervous aggravation. Extreme treble: 8KHz-10KHz suitable, recorder triangle and a sense of vertical metal fork high permeability, the rhythm of the sand clock. Excessive lifting will make the sound is natural and easy to burn high frequency units. 2. balance pleasant voice should be: 150Hz following (bass) should be plump, softness and elasticity;
150Hz-500Hz (bass) should be thick and strong 100 not cloudy;
500Hz-5KHz (treble) should be thorough but not stiff bright;
5KHz above (treble) should be fine, smooth and not shrill. The frequency response is flat: sound natural fullness and flexible, clear and pleasant garden level. Frequency response more peak and Valley: voice rough harsh cloudy, treble, no nervous sense of depth-prone feedback whistling sound reinforcement. 3. frequency characteristics of pitch: 30 ~ 60Hz boring if there is no considerable loudness, the human ear is very difficult to feel.
60 ~ 100Hz heavy 80Hz nearby can produce a very strong sense of "heavy" effect, loudness is high also does not give the comfortable feeling, can give a strong boost.
100 ~ 200Hz plump
200 ~ 500Hz efforts easily cause mental buzzing off.
500 ~ 1KHz clear near as upgrade 800Hz 10dB, will obviously have a noisy, narrow sense.
1K ~ 2KHz translucent 2800Kz near bright sense of relationship with Max.
2K ~ din't 4Kz sharp, sharp 6800Hz formation.
4K ~ 8Kz crisp 3400Hz auditory fatigue caused by susceptible.
8K ~ 16Kz slender slim clear 7.5KHz pitch ". Equalizer trends using digital filter consisting of equalizer is called digital equalizer, digital equalizer to make graphic EQ, parametric EQ can be made, and you can make both EQ, it not only each performance index superior, easy to operate, but also can also store multiple uses balanced frequency response characteristics for different programmes require selection, you can store up to 99 frequency response curve. SONY's SRP-E300 is a versatile 2-channel digital equalizer with 10 parametric Equalization and 29 illustrations balanced, or independent work with limiter and noise gate function, high-precision 48kHz sampling, 20-bit linear modulus/DAC; with analog and digital input/output; RS-232C C interface for external control, that it will phase out ordinary analog equalizer, is a professional audio amplification areas have very high performance-cost ratio products.