Equalizer

Equalizer, is a kind of regulating various kinds of frequency components can respectively signal put a lot of electronic equipment, through various different frequencies adjust to compensate the signals of the speakers and acoustic defects, compensation and decorate various sound source and other special role, general tuning stage of equalizer can only on high-frequency, intermediate frequency and low frequency three sections of frequency signals were adjusted. In communications, the chalaza system insert equalizer can reduce the influence of intersymbol interference.

Adjustment method

Ultra-low sound

20Hz - 40Hz and, when appropriate, powerful voice. Can control the thunder, the bass drum, organ and bass voice. Excessive ascension will make music clouding not pure.

bass

150Hz, is voice 40Hz - based part, its energy accounted for 70% of the entire audio energy, is the important component music style performance. When appropriate, bass relaxation appropriate, voice plump downy, insufficient voice thin, 150Hz, excessive ascension worsened voice fullness, lighness decline, nasal enhanced.

In bass

150Hz - 500Hz, is voice structural parts, headnotes located in this position, insufficient, singing voice will be submerged, music voice soft and weak, appropriate ascension would feel vigorous powerful, raised his voice and strength loudness. Ascension excessive worsened bass become stiff, 300Hz place excessive ascension 3-6dB, such as plus reverberation, it will seriously affect thesound clarity.

The mediant

2KHz 500Hz -, including most of instrument low-order harmonic and then crackling sound, it is small and percussion characteristic of sound. When appropriate, low voice thoroughly bright voice hazy. Excessive ascension produces similar phone voice.

In high

2KHz - 5KHz, is characteristic of string note (pull string bow and string of moab, play the Sang sound of music and the pull string voice one finger touch). Low voice penetration of decline, overpowered masking language when the identification. Syllables,

soprano

7KHz - 8KHz, is to influence voice administrative levels feeling of frequency. Excessive ascension may make stump pipe affair, flutes sound is outstanding, language ChiYin aggravating and tone wool.

Extremely high

8KHz - 10KHz, appropriate, the triangle and made * metallic fully rate is high, the rhythm of ShaZhong legible. Excessive ascension will make the voice is not natural, easy burned high-frequency unit.

Balance should be pleasing of voice

150Hz below (bass) should be plump, soft and elastic;

150Hz - 500Hz (bass) should be vigorous powerful 100 not cloudy,

5KHz 500Hz - (soprano) should be bright clarity and not crudity,

5KHz above (soprano) should be fine, gardens, straight but not Wilder.

The whole frequency response characteristics: the sound natural flat when plump and elastic, distinct level garden shun sweetly. Frequency response multi-peak valley when: rough cloudy, treble voice harsh wool, no administrative levels feels amplification easy happening feedback screaming.

Frequency sound feeling feature

30 ~ 60Hz depressing if not quite big loudness, the human ear is difficult to feel.

60 ~ 100Hz heavy 80Hz nearby can

The greatly strengthened "heavy feeling" effect, loudness high also won't give a person feel good, can give a person with intense stimulation. 100 ~ 200Hz plump

200 ~ 500Hz dynamics easy cause buzz deadening psychology.

500 ~ 1KHz anacreontic 800Hz near as ascended 10dB, significantly to produce a noisy feeling, narrow sense.

Earn ~ 2KHz bright

4Kz sharp 2K ~ 2800Hz nearby light touch relationship is the largest, 3400Hz easy cause listening fatigue.

4K ~ 8Kz ringing 6800Hz formation squealing, sharp, feeling, > 7.5 KHz pitch illumined slender.

8K ~ 16Kz slender

The development trend

Using digital filters composed of equalizer called digital equalizer, digital equalizer can be made here, but make it parameter EQ EQ, still can make both and some EQ, it not only various performance indicators is excellent, convenient operation, and still can also store for multiple purposes FRF equilibrium characteristics for different program requirements, can choose how to store 99 kinds of frequency response characteristics curve. SONY's SRP - E300 is a new multi-functional 2 channel digital equalizer has 10 section parameter equilibrium and 29 Neanderthal here is balanced, may simultaneously or work independently, contain limit device and noise door function, high precision 48kHz sampling, 20 bits linear module/analog-to-digital conversion, With analog and digital input/output, The rs-five 232C C interface and can be used for external remote,, it appear phased out ordinary simulation equalizer, is a new specialized audio amplification area is extremely high xingjiebi products.

P.S.

20 to 40 this frequency sound most sense is soft bass, not powerful, through experiment will know. Look to the ground drum raises the band will have any effect.

2, 40 ~ 150 is voice based yes, but rejects accounts for less than 70%, and could also not in the vocal, probably around 250 band.

3, 150 ~ 500 this band, a force to be in handling were very careful band, can never rely on ascension this band to gain the strength of voices. Slightly carelessly would one regiment was.

4, "300Hz place excessive ascension 3-6dB, such as plus reverberation, it will seriously affect the clarity of the voice." Should say as long as in the low frequency part add reverberation, affect the clarity of the voice. Of course, in what is now the state of mixing skills, this rule is not very important. Because, we are often in Europe and Taiwan's studio see them as the ground drum and bass plus ultra short-range reverberation.

Relevant classification

Equalizer is divided into three categories: here equalizer, parametric equalizer and room equalizer.

Here is the equalizer

Also called chart equalizer, through panel on push-pull key distribution, can intuitivey reflect what accesses the equilibrium compensation curve, each frequency of ascension and attenuation learned, it USES constant Q value technology, each frequency operates a push-pull potentiometer, regardless of ascension or attenuation a certain frequency, filter wide frequency band unchanged. Common professional shown equalizer is will 20Hz ~ 20kHz signal is divided into 10 section, 15 section, 27 section, 31 segments is adjusted. So people according to different requirement respectively choose different section number frequency equalizer. Generally 10 section equalizer in the frequency harmonics cheng interval distribution, used in general occasions, 15 paragraph equalizer is 2/3 times frequency cheng equalizer, use in professional amplification, 31 section equalizer is 1/3 times frequency cheng equalizer, most have the more important need fine compensation cases, shown equalizer, simple in structure, intuitive and clear, therefore, in professional audio is widely used.

Parametric equalizer

Also called parameters to regularize equalizer, various parameters can be careful regulation of equalizer, much attached in tuning stage, but also have independent parameters equalizer, adjust the parameters include frequency band, frequency and gain and the quality factor Q value etc, can beautification (including uglification) and decorate the voice to make sound (or music) style more bright highlight, rich and colorful reach needed artistic effect.

Room equalizer

Used to adjust the room frequency response characteristic curve of equalizer, because adornment material to different frequencies absorption (or reflection) quantity and different Jane was resonance the influence of acoustic dyeing, so must use room equalizer due to build sound of frequency defects to objectively compensation adjustment.

Share the thinner, adjust the frequency of the sharp peak, namely Q value (quality factor), the higher the temperature compensation more meticulous, frequency of the thick is adjustment portion of the peak is wide, when sound field frequency characteristic curve more complex transmission when more difficult to compensation.