Huayu for engineering students

Chapter 146 Speakers
The progress of the speaker is obviously much faster than that of the microphone. After the glue is dry, it can be tested, and even the paint is not in a hurry, anyway, it is the first test.

Populus euphratica's workmanship is not bad, the box is very smooth, he is qualified as a carpenter, and the dimensions are all in line with the standard.

Speakers are similar to musical instruments to some extent. They all rely on resonance boxes to transmit sound, so a pair of good ears is the most important tool for making speakers.

Hu Yang has been engaged in music for two years. Although he has hit the streets, it has allowed his ears to distinguish good and bad sound quality, and he has his own pursuit of aesthetics.

Wang Xu made a lot of combinations of different speakers, looking for the sound he expected, the same sound source, the same power amplifier, it is easy to compare the difference in sound quality of the speakers, well, it may just be easy for Wang Xu.

Many people have heard the saying that the treble is sweet, the midrange is stable, and the bass is deep. This is the most basic requirement for a good speaker.

In fact, the treble also needs to be bright, transparent and penetrating. If it is playing rock and the like, it is best to have some metallic texture.

The midrange needs to be natural and accurate, especially the vocal frequency band in the midrange, which should not be too exaggerated or suppressed. This frequency band is the frequency band that people usually touch the most, and it is also a key frequency band for information expression, so it must be accurate and clear.

The bass needs to be crisp in addition to sinking. This is not the kind of crispness of the treble, but the low frequency of the bass and the large diameter of the speaker, which is especially prone to long aftershocks.

This is easy to cause confusion of the bass, the duration is too long and so on.Crisp means not procrastinating when it is necessary to stop, and ending cleanly.

Before the previous sound is over, and the subsequent bass comes again, they will superimpose each other, forming an ambiguous effect.This kind of situation especially affects the listening experience. Many times, you will feel that the bass is particularly messy, which is caused by this ambiguity.

This kind of confusion may be a problem with the speaker, or it may be a problem with the resonance box. Of course, it is more likely to be a problem with the combination, and it is even related to the placement and the surrounding environment.Or how to say that system engineering is particularly complicated, and inadvertent adjustments may lead to changes in the overall effect.

Speakers, in fact, were already very mature in the 90s, most of the speaker technology and speaker technology had come out, and the new technology did not cause any special revolution.

So this is actually a field with little innovation. Just like microphones, the high-sensitivity microphones during World War II can already hear the calls of dolphins hundreds of kilometers away.

Of course, it can be more sensitive now, but that is only caused by the development of circuit components, and has nothing to do with the technology of the microphone itself.

So Wang Xu's technology from speakers and microphones is all about materials, but there is still one area that has not really developed at the moment, and that is the field of active speakers.

This is an integrated system that directly builds a series of circuits such as signal decoding, filtering, and power amplification into the speaker.Ordinary audio signals can be received directly, and then played directly.

This kind of speaker needs an independent power supply, so it is called an active speaker. In this era, this thing is also called a multimedia speaker. At present, the whole world is at the beginning stage.

This is a byproduct of the development of computers. With the widespread popularization of personal computers, there are more and more applications on computers. Since the 386 era, various multimedia applications have appeared on personal computers, and the ones on computers can only issue simple The speaker for sound is completely inadequate.

As a result, some large and small solutions began to appear everywhere, and active speakers are one of them, and this thing is a sharp weapon prepared by Wang Xu for the market.

The effect of active speakers can actually be very good. There are even active speakers with a unit price of more than [-] in later generations, and the effects of those speakers are actually really good.

However, active speakers are generally not too large, so the bass effect is often mediocre, and the internal circuit will be more or less affected by the sound vibration, and there will be some defects when they are related to each other, so the real listening room will not be used. Active speakers.

Active speakers are a market-oriented product for the general public, while listening rooms are professional audio equipment, which are quite different.

It took several days for Wang Xuguang tossing about various speaker combinations before finally deciding on several combinations.

He first chose a simple combination of standard bass, midrange and treble.This is his top product for the listening room, from materials to processing are carefully crafted.

Wang Xu purchased a large number of components. There are dozens of types of speakers alone, and thousands of combinations. He didn't have so much time to do too many experiments, so he could only start with the simplest one.

The listening room has been decorated long ago, everything from sound insulation equipment to special sound-absorbing curtains has been installed, but the equipment is still supported by the rented landscape.

Wang Xu's new speaker is more than one meter high, including a [-]-inch large woofer, a [-]-inch mid-range speaker, a tweeter, and a bass guide hole at the bottom.

The style is very simple, without any fancy, dark brown cherry wood grain, the overall image is square, there are four very thick, short metal texture support feet underneath, revealing the only bright color.

The cabinets have rounded small chamfers to form some cut surfaces. The front cover panel is an ordinary black mesh, and the bottom is a dark guide hole like a big mouth.

The front cover panel included in the system is a kind of elastic mesh fabric. Wang Xu hasn't taken out that thing yet. Well, maybe the material department is about to get rich again.If things go on like this, Wang Xu estimates that the Materials Department will have to set up a laboratory for himself.

The speaker as a whole shows a rough aesthetic. This is a unified design that matches the violent aesthetic style of the tube amplifier. As a designer, how can we ignore the creation of the overall atmosphere.

It can be said that Wang Xu is quite satisfied, at least the shape is quite domineering. In the background of the end of the Soviet Union, they used their once unrivaled electronic tubes as tube amplifiers to design such a speaker with a violent aesthetic style. Let's commemorate this once glorious red empire.

It’s just that Wang Xu won’t mention this background, let alone publicize it. The wind direction at this time can’t miss this, maybe it can be mentioned in the memoirs decades later, Wang Xu is a little emotional.

The pair of speakers had just been processed, and they were installed in the listening room by Wang Xu impatiently.The seats in the listening room are all specially designed and planned, and the original equipment only needs to be removed.

Then put Wang Fei's latest CD into the disc player, sit comfortably in the best listening position, and enjoy it quietly.

A voice like the sounds of nature came, and Wang Fei's gentle breath seemed to surround her. Every utterance, every inhalation, was clearly and brightly reproduced, as if the woman was singing for you right next to your ear.

-

(first update)
(End of this chapter)