Digital audio

I speak here of the acoustical theory, the main is to make all aspects of a sound guy can understand acoustic, rather Multimedia Speaker the acoustic study, acoustic thesis or master, doctor, so I speak in this book in 1915, an American named e. supachai panitchpakdi ridham to a phone to listen to at that time set on a play sound horn, and the voice can give a group of people listening to celebrate Christmas in the city of San Francisco, electroacoustics was born. After the end of world war I, in the United States President Harding (Harding) his inauguration, the telephone bell companies in the United States of moving coil to connect at the time of the horn on the record player, will be able to pass the sound to watch the inauguration of a bookshelf computer speaker group of people, thus creates a lot of professional audio research and development the amplification engineering this science. The stereo sound researchers not only hard equipment was improved, also experimented with all kinds of different sound to understand human reaction to hearing. But the highest sound human with all know learning is to the overall research, understanding the each link, audio equipment and human physiological reaction to hearing, they made a great contribution.

Sound playback of normal voice signal strength and the ratio of intensity of noise signal

Refers to the normal sound playback voice signal strength and the ratio of intensity of noise signal. Low signal-to-noise ratio, small signal when the input noise is serious, in the whole range of voice grew noticeably muddiness, blare blare du not hair what sound, very affect the sound quality. Signal-to-noise ratio is less than 80 db speakers, less than 70 db bookshelf speaker doesn't suggest to buy! Sensitivity (dB) : this refers to produce full power output when the input signal, the lower the input signal, the higher the sensitivity. Poor speakers, the sensitivity of each 3 dB, the output sound pressure differs twice, with 87 dB sensitivity, commonly below 84 dB for low sensitivity, above 90 dB for high sensitivity. And the improvement of sensitivity at the expense of the distortion degree increase, so as a high-fidelity speakers, to ensure the reduction degree and representation of timbre capacity will have to reduce some claim to the sensitivity. Sensitivity is an indicator of speakers, but it has nothing to do with the speaker sound quality tone. "Active speaker" of the "active" active speakers is a signal processing circuit, control circuit and power amplifier speakers. Active speaker can directly with the general audio source (such as the bookshelf computer speaker, CD, VCD, VCR, computer sound card, etc.) are tie-in, form a complete set of sound system. With active speakers, there is no need to purchase another power amplifier, also do not have to worry for power amplifier, speakers of reasonable collocation. Active speaker has a very high cost performance, due to the active speakers built-in amplifier circuit, make the attachment much shorter than the outer power amplifier, is much more simple, small 巵 talk, background noise. Active speaker with built-in amplifier, can greatly save household space. Active speakers, simple operation, only some necessary switches and adjusting knob on the box body, remove the other power amplifier on practical operation knob, not can only simple to open the power switch can be. Special SOUND technology hardware 3 d SOUND technology is now mostly use of SRS, APX, Spatializer 3 d, Q - SOUND, Virtaul Dolby * and Ymersion several, although their application theory is different, but they can make a person feel obvious three-dimensional acoustic field effect, the first three are more common. And there are two kinds of audio enhancement technique: active mechanical and electrical servo technology and own empowerment, high-definition plateau sound playback system, to improve the sound quality also to have certain improvement effect.

Sound effects

To enjoy the concert. Multimedia Speaker spirits, this is not only due to the beautiful music melody? But important is that the scene of playing and singing sense of reality. Through the sound system and pored over recorded shows, however, will often make people feel monotonous and boring. This in addition to other factors, an important reason is that, in the process of program of record, put all the music signal through a signal channel caused by signal "crowded" and interfere with each other. So. In the modern hi-fi stereo systems? Besides using bookshelf computer speaker channel stereo system, and multi-channel stereo, surround sound, and to enhance the presence of various site digital delay circuit and sound processing circuit. These circuits in addition to restore the scene effect. Part of additional effect. But whether to restore the effect or add new effect. The goal is always to make maximum through sound system broadcast recording program, approach and to achieve the effect of a live performance, singing.

Desktop audio speakers

Although the desktop is the stereo, but some desktop audio speakers parts can be installed separately. So how to speakers when fission installation layout? You might say, a total of two speakers, more particular about what layout? And, of course, if your speakers on the corner or your speakers on the middle side of the room, to the sound is very different. bookshelf speaker small desktop audio two speakers we suggest you where the nearest to the listening position, position an axis of symmetry in the room. Two speakers distance not too far, or otherwise the two speakers of power of the desktop audio, it is hard to Wooden Computer Speaker to generate a sound field. Due to not professional listening room with sound-absorbing structure, so it's best to reduce the noise in the room, according to the number of bounces back and forth to prevent because too much cause reflection noise increases, also avoid two channel reflection about the sound field in different path imbalance. Of course, every can fission desktop sound at the beginning of the purchase will be equipped with a sound box line. Sound box line is long, don't cry because it is afraid of trouble in the process of installation and shorter without authorization, otherwise this and two speakers placed a far a nearly no difference. If you sound box line is not long enough, or because of other reasons to buy separate, so suggest you buy high quality high fidelity sound box line, because such small sound box line resistance loss higher sound quality, some sound box line also has the ability of anti-jamming. Also have to wait long lines, of course, when buying.

Often keep the horn looks clean, all wiring more secure

Often keep the horn looks clean, all wiring more secure

(2) check and tighten the horn and bracket set screw, ensure the reliable iron.

(3) fixed method of horn on its influence on bookshelf speaker. In order to make the speaker's voice is normal, the speaker can't be installed rigidity, and fixed on the bracket of buffer, namely between the horn and fixed bracket to a plate spring or rubber pad.

(4) check the generator output voltage. High voltage will burn out the horn contacts, low voltage (rated voltage below the horn) speakers will be abnormal sound.

(5) wash the car, not directly with Wooden Computer Speaker flushing megaphone, so as to avoid water into a megaphone and make the horn.

(6) the horn in overhaul, should pay attention to the position of each metal gasket and insulation pads, thou shalt not put any fault.

Continuous pronunciation (7) the speaker shall not exceed 10 s, so as not to damage the speaker.

(8) may not be all kinds of foreign bodies into the horn, lest cause abnormal sound

Medium mixed sound resonance

Medium mixed sound resonance, sound principle, USES a vibrator vibration sound + paper eardrum trumpet sound, we often use the stereo knows that, in addition to the ordinary acoustics professional audio, general average sound heavy bass is not enough, the bass better generally have no small volume, this is mainly due to the adoption of the horn TV Speaker sound affected by voice unit cell size is very big, so a lot of multimedia audio directly USES the subwoofer, external speakers, fully expand the scope of its sound unit cell volume, but it have a lot of restriction for the Wooden Computer Speaker of the stereo sound, that is why we see stereo in the market are generally four directions, four is the cause of the angular and bass effect is not very good. Combined sound exactly is the integrity of the manufacturers of the stereo set machine, its function as complete as possible, easy to use, look gorgeous. All part of the combined sound, such as speakers, amplifiers, booth and CD are provided by the manufacturer, is to cooperate on the whole, and are more uniform in shape, beautiful; After buying customers don't need to spend a lot of time debugging, generally can be used directly, more convenient in operation, function is relatively complete. Many people believe that the quality of the audio system is not high, but in fact, with the development of electronic technology, the performance of the combined sound also have greatly improved, therefore, for the majority of users, combined sound has been completely can meet the need. Combined sound of price, quality, performance, of course, there is a great gap, have one thousand yuan level of products, also have ten thousand yuan of products, need to which kind of, can according to customer's own economic strength and the demand for choice. When there is a tree in the forest fell down, gave a crashing the loud voice, but no one in the virgin forest, so I can't hear the sound. This is not a voice out? The sound come is for sure, because when the trunk and branches of the contact with the ground, they will produce certain sounds, but no one heard, but heard this voice for humans or other animals is different, so this is what is said in the acoustic psychological (Psychoacoustics).

Speakers of miniaturization, digitalization, specialization, film and television

Miniaturization, digitalization, specialization, film and television is the inevitable trend of the development of home electronics. The stereo miniaturization. Multimedia Speaker desktop music center has a long history, more than 10 years ago has been advanced bookshelf computer speaker combined sound. But as a result of listening speakers, stereo gramophone, recording booth is not very good solution, so has been stay on the lower class. In order to create a small sound world, not only from the amplifier, control parts, left and right speakers, have to from the aspects of the tuner, CD player and recording booth together. Digital audio. Digital technology is a new technology, so the digital audio development in solving the problem of distortion of simulation of the acoustic noise. Sound using the digital technology, digital signal from the sampling frequency to the quantitative characteristics of records, has a clear resolution, no color dithering, get the image is very clear. And you can swap and the upper machine, the analog playback as equipment cannot match. Digital recording may take the time, name, address, entry, using tiny keyboard to complete the cataloging work, change the track number, coupled with the function of remote control, allows you to automatically search need to track, easy to use. The film and television equipment integration. Digital stereo as electroacoustic technology, film and television technology,