With the ear will need to listen attentively "strategy is despised enemy, tactical enemy" this words on. First you must confident your ears than the so-called "gold" the ears. The human auditory physiological tells us, as the growth of the age, the eardrum and inner ear hair will harden, book of high frequency can respond. Only young children auditory organs of small size, texture is soft, can be heard above 20khz ultrasound. After 20 years and gradually declined over the age of 50, and hear the voice 16khz already difficult. Of course the old enthusiasts rich experience and skills to compensate a loss, but gradually become bad hardware is inevitable. Therefore, the professional subjective evaluation to audition have different age and sex of the personnel to attend. As long as no hearing defect, and you can also when the judge. Of course, some of the most basic CeTing technology and subjective evaluation of language also must listen, and grasp the exact meaning and discretion.

 

First, it can be familiar with pure sine wave single-rate ac signal, which is the static performance is stereo inspection of a kind of method. The most convenient method is broadcast Hugo fever disc (a) last 17-45, here is a sine signals from 25hz began to 1/3 times as a step frequency, 29 20khz to. If the quality is better simulated sine signal generator, no high harmonics source nor need CD. From 17 paragraph, gradually improving backward tones. If the level, if also gradually strengthened; start loudness To 27 and 28 (about 300-400 hz) volume will no longer rises, 40, 41 (about), volume 779 Hertz and begin to decline. If the equipment, the volume is flat middle sections will be narrowed, listen to music when high range and low weight less range. If the frequency domain tones are not rise gradually, a paragraph, such as 19 section has mutation sounds rather than for 20 more hard, more ring, 19 (40hz), namely intermodulation noise is original 40hz bass, a high frequency sound, so the tone of the high also, large capacity. Many inferior speakers when will appear. Listen to music, normal for a certain frequency, and most of the time, will have a lot of harmonic voices feeling, not to identify problems, the equipment operation is difficult for beginners. Listening is easy to operate more pure.

 

Room acoustical environment, as there are defects in waves, resonance or blunt auditory reflective surface, also can make different frequency of loudness uneven, can transform the speakers position-measuring or room furniture put, reflective surfaces or resonance. Source Single pure stability, simple, easy to find in them of noise.

 

In addition, several key 25hz tone frequency (17), 40hz (18) and 500hz (29), 1khz (32), 2khz (35) and should have 4khz etc. Many speakers including low speakers did not actually 25 40hz and the bass, many people put a ring in 80hz around 60 - as times feeling in the bass bass. Also, 2khz, 4khz sounds are very harsh, but it isn't people to pursue 12khz above treble. Listening comprehension describe vocabulary practice sound much more complex, the voice of listening to use words to describe in words, but the expression of the most delicate adjectives. If you want to come from the description of the foreign language translation, the harder the hands have an English language, the quality evaluation of the 52 adjectives, collection of some words are even english-chinese dictionary of Chinese annotation, is how to understand the expression? Voice So the more detailed, the delicate description may be more difficult to exact some simple, first. Canada's national research center of quality, make test box filled with the judge of the ten tables, easier to understand and grasp, and explain them in the expression of meaning, sounds to improve the ability of the person CeTing sound subjective will help. These words are respectively:

 

Analytic: analytic force is also called clarity, clear description. He listens to language, with clean and agile, no ambiguity. Listen to music, a few strings to the music, what music apart. Listen to the bass drum, crisp, trombone, drum respective timbre is correct, not like TV or combined sound in the sound of the buzzing.

 

Soft voice: sounds, let a person feel the warmth downy and pleasing, no harsh voice of scratchy without. Listen to this aspect usually female programs with better properties, listening to music and heavy disco aspects of this equipment is not appropriate. Although say the downy refers to the equipment performance and not the software itself, but the software programs to listen hard itself, it is difficult to performance.

 

From the audio signal characteristics, downy, bass reduction in the said, noise and harmonic distortion. The equipment will be increased aderse high harmonic distortion, listening curt heavy metals, harsh, metal materials (like the sound).

 

Full: full fruity voice, bass baritone and this feeling is obvious. Show a wide frequency equipment, especially the bass, and extends the bass sound even, reverb moderate.

 

Bright bright, sunny-sounding: there, in soprano and freshness of high performance and the string of small easily find this kind of music. Explain the plain, high audio equipment and distortion. If too high or distortion, the bright becomes harsh. In addition, also should have appropriate reverberation, otherwise there will be dry feeling, light up.

 

Open the description is spacious, contrary, narrow, small, lack of acoustic field when listening to the wide scene. The stereo feeling and the two channels of crosstalk level and balanced. Crosstalk, good symmetry, reverb correctly, feeling is wide field.

 

Kind: kind or scholars strong refers to sound like to hand touches, general. Generally the mediant for good equipment, the feeling is stronger.

 

Noise and distortion: no signal input, sound, the hiss buzzing noise, the device for the bad performance or process. The equipment is due to the distortion of frequency or bad wire, make originally voice has changed. No input, sound volume at a hearing little noise should metres, or programs need when silent, will have hate background noise, normally use transparent becomes poor when voice. Distortion, and familiar voice is out of the original comparison can hear.

 

Strength: the strength and loudness meaning is different. Loudness refers to the voice rang feeling. Two sets of equipment in the same repertoire, can plan to ring as loudness. But a may sound rather dull, another is ringing. Efforts to voice big, verve, low voice say, strong dynamic range wide. Light rings, to ring without distortion is strength.

 

The last two items for satisfaction and fidelity, this is the general impression and contain personal interests and aspirations. Using the above described self-consciously to compare different sound equipment, you can practice the ears.

 

When you have the ability to discern the hearing, will eliminate the influence of hearing the psychological factors. A mother of overworked one day in slumber, to train the Mercedes Benz car; or indifferent, and all great voice for their babies crying or restlessness is very sensitive. This is an often used to explain human auditory system of selective.

 

In your audition a audio equipments, equipments appearance, price and media bombarded propaganda, has made a first impression. The price is expensive, imported brand, in your deep psychological on one end points. So, when you listen in the bottom out to watch. But the psychological phenomenon is a kind of science, no matter who could not get rid completely. So professional subjective audition to adopt double blind: one is the listener to see equipment, speakers and equipment have been perforated opaque fabric, only hear its voice does not interfere in its surface, 2 hear voice is operator according to the instructions of instruments, send out sound. Human physiological auditory studies showing that just slightly larger volume, the frequency range of tones to interested voice is improving. So, if the two speakers sensitivity, system is wrong, so that the low sensitivity scoring will suffer speakers. Businessmen to induce you to buy a product, if the audition than other amplification volume, you will take the bait. So the operator should not hear the sound, lest his views to the critical virtually.

 

Before using the subjective listen - b - a system, the first, and then put the reference equipment tested equipment, equipment, the final score. Reference This program is still later found entrainment, because you know that the second paragraph for being measured, total want to listen to sound out some difference. Now the advanced electric control subjective audition laboratory has adopted the audition for random method. Listen to your voice, and reference you want to hear how many times, listen to sound can also be compared to many times, it is the stage of training. Enter, first phase audition ratings for reference, then you give you another sound, the sound is reference sound or listen to sound is given by the computer random, then by you. If you want to hear a sound that can reference, but want to repeat the second is just the voice is impossible.

 

After several rounds of such ratings, computer can put conclusion statistics. If the second random given reference sound, you are also disorderly grading, computers think you have a hearing problems, your score will not be adopted. Only the reference points can play the listening, the score is valid. Doing so basically eliminating psychological factors of interference and cleaning HunShi "NaGuoXianSheng" this operation is very difficult, but also by a number of conflicts of interests, pushing against a some difficulty. A primary authority of recording engineer and enthusiasts to listen to the people, the results are eliminated eight-finals, they are "golden ears", "golden ears." In addition, at the beginning of each stage of training evaluation is not the same, and enter the subjective and objective of the hearing. Also, any problem, a listening training can also when the judges of the audition subjective. Scientific conclusion is only, can be repeated.

 

Listen to music by ear with heart sounds

 

This can understand the complex but no physical voice, but when voice mysterious music composition was changed. People listen to music and sounds is different, the former, the latter in mind in the ear. Listen to music, ear is merely a channel, Beethoven was deaf ears, still can create and command the ancient classics, here is the ear is not fatal. Listen to the equipment in good ear, ear should rely on to identify the space of heart sound will mislead your judgment. Enthusiasts often use ears and heart sounds in, the average person cannot read or accept their views. I want to buy equipment when you should use ear to hear, and play equipment when you might as well go home with some music appreciation, and finally used in mind when, want of course to and musicians, equipment or voice but is a bridge to shore.