It is short and pithy, standing alone in a corner of the desktop, with a dark body and a faint green light shining overhead.
It is silent, but it is secretly condensing internal forces, causing the desktop to roar. ...
……
This is a true portrayal of a * * * vibrating speaker exciting the desktop to sound. Audio lovers have long been familiar with multimedia speaker systems such as 2.0, 2. 1 and 5. 1, but this concept of * * * vibrating speaker may be unheard of. What is a vibrating speaker? Simply put, there is such an audio system, which has no diaphragm, and it will make sound when it comes into contact with medium and hard objects.
Some people think that in this way, it should be put in different places and make different sounds. That's right. Its vibration characteristics determine that the timbre of its sound depends on the material of the object it touches. After listening to it, on the thick logs, its sound is low and obvious. On the glass, the sound is crisp and loud, and the treble performance is outstanding. What kind of speaker is this? We got the finished product, which is a mini * * * vibrating sound with the brand of "free driver" produced by Gansu Tianxing Rare Earth Functional Materials Co., Ltd., and the model is FD-500i.
Gansu Tianxing Rare Earth Functional Materials Co., Ltd. was established in June 1998. Gansu High-tech Development Zone is a manufacturer specializing in the research and development and industrial production of cutting-edge intelligent materials-rare earth giant magnetostrictive materials. 1999 was recognized as a high-tech enterprise by the provincial science and technology department in September, and passed the ISO900 1 quality system certification in June of the same year. It is the only manufacturer with independent intellectual property rights and application device development in China.
Feirui MINI*** Tik Tok appearance introduction
There is nothing special about the outer packing. I never thought it was such a small thing after I opened it.
This stereo is very small, with a size of only 60×60×50mm, which is basically close to a cube. Its weight is not light, and it feels heavy in your hand.
Its shell is made of all-aluminum alloy, and the top surface is a diamond-grade mirror, which is very beautiful and easy to leave fingerprints. The mirror cloth with clean surface is attached to the package, which can ensure the cleanliness of the box at any time. Its corners are round, and its rigidity is removed in the process of stabilization.
There are three control buttons on the front of the box, with a switch in the middle and volume up and down on both sides, which is simple but practical. More control functions are integrated in the remote controller. Two jacks, one for audio signal line input and the other for power input.
Batteries used on the remote control
This is a full-function remote controller with this speaker, which has a general feel and comprehensive functions, including high and low voice adjustment, just for us to control the sound more conveniently.
On the small cylinder at the bottom, it goes without saying that it is a secret. I want to open the internal components and find that the shell is completely closed by ultrasonic welding. Combined with its previous products and the description of related websites, we speculated about its structure: it should be a very large rare earth magnetic steel, which must have a very large magnetic density. Only rare earth materials can have such a large density, which is why it is small in size but not light in weight.
There should be a small coil inside the magnetic steel, and the coil is connected with an iron core, and the two are rigidly connected.
The other end of the coil core is fixed on the bottom cylinder of the free driver, and the rubber pad is in close contact with the medium. When the audio signal is input, the huge signal power input by the internal coil and the huge magnetic flux of rare earth magnetic steel will cause the iron core to vibrate violently, and then this vibration will be transmitted to the small cylinder at the bottom, driving the medium to vibrate and make sound together.
The power amplifier circuit should be integrated inside the box. Analysis of phonation principle:
From the above information, we can see that this * * * vibrating electroacoustic core driver is made of rare earth materials, which is developed by Gansu Tianxing Rare Earth Functional Materials Co., Ltd. and has independent intellectual property rights of GMM materials. According to the author's relevant information, "rare earth" is a general term for more than a dozen special metal elements (called rare earth group in the periodic table). Adding a small amount of rare earth elements to the alloy will produce alloy products with very unique properties. The most common use is high-density magnets (such as so-called "neodymium magnets") made of rare earth alloys and alloys with high wear resistance and high strength (often used in military fields). It is worth mentioning that China is the world's largest country in rare earth minerals, and more than half of the world's proven rare earth minerals are located in the central and western regions of China. Gansu is located in the west of China and is rich in mineral resources.
The function of this audio driver can convert the audio signal into audio mechanical vibration and output it to the sounding medium. Equipped with power amplifier and sound source, it can push any hard objects such as wood, stone, plastic and glass. Make it sound.
Through the introduction of the above appearance and the analysis of the sound principle, we know that the most basic feature of this product is its small size, which solves the problem of insufficient desktop space in another way, throwing away the huge volume of the original X. 1 desktop speaker and replacing it with a clean and tidy desktop. In addition, with the rapid increase of notebook users, the demand for portable speakers has also become extensive, and Feirui vibrating audio is also a good solution. It's just that this speaker is small in size, but it's a bit heavy because of the particularity of the material. Whether it can really be made portable is still a question worth discussing.
In addition, this product solves the problem of sound field well because it promotes the sound of hard objects. From the knowledge of acoustics, we know that the sound generated by vibration is centered on the vibration source, and the sound wave propagates around in the form of waves, and the energy gradually weakens during the propagation. The sound field produced in this way is very uniform, and the sound propagation in solid is not as easy to decay as in air. In other words, the product uses the whole medium such as the desktop as the diaphragm part of its sound generating unit through vibration, completely getting rid of the traditional concepts of four-inch unit and five-inch unit! This is a breakthrough and innovation! Perhaps this is a brand-new way to break through the stagnation of audio technology! But then again, I have to pay attention to one thing. I'm afraid this method has an insurmountable weakness, that is, it can only produce sound in mono. Once the second vibration point appears, it will inevitably produce harmonic interference, and the sound wave will either cancel or strengthen in some parts. The position control of two vibration sources will limit its free mobility, so it will not be portable. Every coin has its two sides. How to make the sound play better has to be explored from other angles. Let's talk about what kind of use is more suitable. The most obvious thing is to put it on any desktop (such as desk, conference table, demonstration table, etc.). ) In a conference or business presentation. Through a miniature microphone, the sound or music built into the device can be transmitted to everyone around the table through the desktop, making the table a stereo. No matter where you hear the sound around the table, the sound field is very uniform, and the effect and volume are not inferior.
In addition, the particularity of the core material: waterproof, high temperature resistance, strong plasticity, low voltage operation and so on. The environmental adaptability and safety are very good, and the final product can completely appear in any shape in a special environment in a fully enclosed form. For example, you can install the audio driver under the bathtub or in the sauna room, so that you can enjoy music while taking a bath. The audio driver can be installed on an artificial mountain in the family garden or decorated with artificial frogs and artificial landscapes, or under a table, bar or wooden wall in a coffee shop or bar, so that you can enjoy pure and beautiful background music.
In this way, products and technologies have great market value. I still remember an activity of participating in the experience of Gigabyte motherboard Intel Joy platform. The staff took us to the bathroom while demonstrating the entertainment and extended performance of the platform, and showed the scene that we could play movies in the living room and listen to music in the bathroom at the same time. At this time, a female reporter asked a pair of ordinary speakers in the corner of the bathroom: "won't the speakers get wet when taking a bath?" The staff can only explain that this is just a demonstration. If speakers are installed in the bathroom in real life, it will be a big decoration fee, and everyone will laugh it off. When writing this vibrato now, I think back to the past period and think it will be useful in the near future.
In addition, there is a kind of acoustic vibration therapy in medical care, which is a new acoustic treatment technology. The principle is that it is transmitted to the human body through water and other media, and the human body is adjusted by music vibration to change the body function. Music vibration can weaken symptoms, induce relaxation and relieve stress. Interested readers and friends may get some information from this article. Trial experience
Feirui Vibrato has some interesting details in its use. First of all, from the aspect of appearance, it can observe the instructions of different colors of lights at the top from one angle after power-on, green when power-on and red when power-off, which is convenient for observing its running state. The function buttons on the three boxes are simple and convenient, with good elasticity and feel. Compared with the remote controller, it feels ordinary, but it has comprehensive control functions and can be controlled more freely.
The effect of sound playback can be described as "changeable". As mentioned above, placed on the surface of different media, the sound it emits (to be precise, the sound emitted by the media) will have different characteristics. On glass, its high-frequency effect is obviously better than that of wooden boards, while on thicker and larger planes such as wooden boards, the bass can be enhanced. We got the best effect on the frosted glass mouse pad borrowed from the peripheral editor. It's thick, four rubber pads are stable, and the sound quality is good. On the metal, I'm sorry I can't describe their sound, but there is a sound of a little thread being pulled out. Sell a pass, and interested friends can buy it and try it at home.
When this speaker is picked up and hung off the desktop, there will still be a weak sound coming out, similar to the sound made by headphones to amplify the volume; When it is put on the desktop and pressed by hand, the sound is more "practical" and has some flavor, so it is suggested that if you really want to buy it and listen, you'd better press some heavy objects on it.
Free drive) FD-500i, put on the desktop, let us shine at the moment. It is the crystallization of new ideas and bold innovation. It can turn any solid around us into a sound generator, give full play to our imagination and experience different sound quality feelings brought by various materials. Can it be accepted by ordinary consumers in the market Or is it easier to survive in those special applications, such as underwater, parks and medical care equipment? Let's wait and see!