This is a speaker I have never seen before.
It is short and compact, standing alone in the corner of the table. It is completely black, with a faint green light shining on the top of its head.
It is silent, but it is secretly condensing its inner strength, causing the desktop to roar...
...
This is a *** vibrator The majority of audio enthusiasts are already familiar with 2.0, 2.1, 5.1 and other multimedia speaker systems, but they may have never heard of the concept of this kind of "magnetic vibration" speaker. What is a vibration speaker? To put it simply, there is such a sound-producing system that does not have a diaphragm itself and will produce sound by contacting a medium-hard object.
Someone thought that the sound should be different depending on where it is placed. Absolutely correct, its vibration characteristics determine that the timbre of its sound depends on the material of the object it contacts. After listening to it, when placed on thick logs, the sound it produces is low-pitched and has obvious ringing; when placed on 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 vibrator speaker with the brand name "FREEDOM DRIVER" and the model is FD-500i produced by Gansu Tianxing Rare Earth Functional Materials Co., Ltd.
A brief introduction to Gansu Tianxing Rare Earth Functional Materials Co., Ltd., which was established in June 1998. It is a company in Gansu High-tech Development Zone specializing in the research and development of cutting-edge smart materials - rare earth large magnetostrictive materials. Manufacturer of industrial production. In September 1999, it was recognized as a high-tech enterprise by the Provincial Department of Science and Technology, and passed the ISO9001 quality system certification in November of the same year. It is the only domestic manufacturer with independent intellectual property rights and application device development.
Introduction to the appearance of the Feirui MINI vibrating speaker
There is nothing special about the outer packaging. After opening it, I had no idea that it was such a small thing.
This speaker is compact in size, measuring only 60×60×50mm, basically close to a cube. It is not light in weight and feels heavy in the hand.
Its shell is made of all-aluminum alloy, and the top surface is a diamond-grade mirror. It is very beautiful and easy to leave fingerprints. The package comes with a mirror cloth for cleaning the surface, which can keep the case safe at any time. Body clean. Its corners are rounded, and it is stable without being rigid.
There are three control buttons distributed on the front side of the cabinet. The middle is the switch, and the two sides are for volume up and down. They are simple but practical. More control functions are integrated into the remote control. Two jacks, one for audio signal line input and the other for power input.
The battery used in the remote control
This is the full-featured remote control that comes with this speaker. It has a general feel and comprehensive functions, including high and low tone adjustment, etc., just for our better convenience. Conveniently control your speakers.
The small cylinder at the bottom, needless to say, is its secret. I wanted to open it to take a look at the internal components, and found that the outer shell was completely closed by ultrasonic welding. Combining its previous generation products and descriptions from previous related websites, we speculated on its structure: inside it should be a very large rare earth magnet. The magnet must have a very huge magnetic density, which can only be achieved by using rare earth materials. Such a high density is why although it is small in size, it is not light in weight.
There should be a small coil inside the magnet, and the coil is connected to an iron core, and the two are rigidly connected.
The other end of the coil core is fixed on the bottom cylinder of the FREEDOM DRIVER, and is in close contact with the medium with a rubber pad. When an audio signal is input, the internal coil will input a huge signal power. Together with the dual effect of the huge magnetic flux of rare earth magnets, the iron core vibrates vigorously, and then conducts this vibration to the small cylinder at the bottom, driving the medium to vibrate and produce sound together.
The power amplifier circuit should be integrated inside the cabinet.
Analysis of the sound generation principle:
From the above information, we can see that the electroacoustic core driving device of this vibrating speaker uses rare earth materials, which is the use of independent intellectual property rights by Gansu Tianxing Rare Earth Functional Materials Co., Ltd. Developed from GMM materials. The author searched for relevant information and found that "rare earth" is the general name for more than a dozen special metal elements (called the rare earth family on the periodic table of elements). Adding trace amounts of rare earth elements to alloys will produce alloy products with very unique properties. The most common The purpose is to use high magnetic density magnets made of rare earth alloys (such as so-called "neodymium magnets") and high wear resistance and high strength alloys (commonly used in the military field). It is worth mentioning that my country is the largest country in rare earth mineral reserves in the world, and more than half of the world's proven rare earth minerals are located in the central and western regions of my country. Gansu is located in the west of my country 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 a sound medium. Equipped with a power amplifier and sound source, it can push any hard objects such as wood, stone, plastic, glass, etc., so that its vocalization.
Through the above introduction of the appearance and analysis of the sound generation principle, we understand that the most basic feature of this product is its small size. This new approach easily solves the problem of tight desktop space and abandons the original X.1 The huge size of desktop speakers is replaced by cleanliness and neatness on the desktop. In addition, with the current surge in the number of notebook users, the demand for portable speakers has also become widespread, and Feirui vibrating speakers are also a good solution. Although this speaker is small in size, it is a little heavier due to the particularity of the material. Whether it can really be made portable is still a question worth exploring.
In addition, since this product produces sound by pushing hard objects, it is a good solution to the problem of sound field. From the knowledge of acoustics, we know that the sound produced through vibration is centered on the vibration source, and the sound waves propagate in the form of waves to the surroundings, and the energy gradually weakens during the propagation process. The sound field generated in this way is very uniform. The propagation of sound in a solid body is not as easy to attenuate as it propagates in the air. In other words, the product vibrates and uses the entire medium, such as the desktop, as its sound source. The unit diaphragm part completely breaks away from the traditional concepts of four-inch units and five-inch units! This can not but be said to be a breakthrough and an innovation! Maybe this is a new way to break through the stagnation of audio technology! But having said that, there is one more thing that must be noted. This method may have a weakness that is difficult to solve, that is, it can only produce sound in mono. Once a second vibration point appears, harmonics will inevitably occur. Wave interference, sound waves are either canceled or strengthened in some parts. The position control of the two vibration sources will limit its free mobility, making portability impossible. There are advantages and disadvantages. How to make the sound playback effect better has to be explored from other angles. Let’s talk about what uses it is more suitable for with such characteristics. The most obvious one is to place it on any desktop (such as office desk, conference table, presentation table, etc.) during meetings or business presentations. , through the miniature microphone, the sound or the music built into the device can be transmitted through the desktop to everyone around the table, turning the table into a speaker. The sound is the same no matter where you sit around the table, the sound field is very even and the effect and volume are not inferior at all.
In addition, the special characteristics of the core materials: waterproof, high temperature resistance, strong plasticity, low voltage operation, etc., make the environmental adaptability and safety very good, and the final product can be fully enclosed in any shape appear in special circumstances. For example, audio drivers can be installed under the tub or in the sauna so that you can listen to music while taking a shower. The audio driver can be installed in the artificial rockery in the home garden or in decorations such as artificial frogs and artificial landscapes. It can also be installed under the table, under the bar or behind the wooden wall in the coffee house and bar, and you can enjoy the innocence. beautiful background music.
It seems that this product and technology have considerable market value. The author still remembers an event where I participated in the Gigabyte motherboard Intel Joy platform experience. The staff took us to the platform while demonstrating the entertainment and expansion capabilities of the platform. In the bathroom, it is shown that while a movie is playing in the living room, music can be listened to in the bathroom at the same time. At this time, a female reporter asked a pair of ordinary speakers placed in the corner of the bathroom: "Won't the speakers get wet when taking a shower?" The staff could only explain that this was just a demonstration. If it were used in real life, Installing speakers in the bathroom will cost a lot of money, and everyone will laugh at it. Now that I am writing about this vibrator, I recall that period in the past, and I thought that it will definitely be put to use in the near future.
In addition, there is currently a kind of somatosensory music therapy in medical and health care. It 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 can be adjusted by music vibration. , its physical function can be changed. Musical vibrations attenuate pathologies, induce relaxation and reduce stress. Careful readers may get certain information from this text. Trial experience
There are some details in the use of Feirui vibration speakers that are very interesting. First of all, in terms of appearance, after it is powered on, the different color light indicators inside can be observed from an angle on the top. When the power is on, it is green, and when the power is off, it is red. You can easily observe its operating status. The function buttons on the three cabinets are simple and convenient, with good flexibility and good feel. Compared with the remote control, the feel is average, but its control functions are very comprehensive, and you can control it more freely.
The sound playback effect can be described as "variable". As mentioned before, when placed on different media surfaces, the sound it emits (to be precise, the sound emitted by the medium) will have different characteristics. On glass, its high-frequency effect is significantly better than on wood. , and on thicker and larger surfaces such as wooden boards, the mid-bass can be enhanced. We got the best results on the frosted glass mouse pad borrowed from the peripheral editor. It is thick and has four rubber feet that are stable, and the sound quality produced is very good. As for the metal ones, I cannot describe their sound. There is a sound of threads being pulled out, but it is a good idea. Interested friends can buy them home and try them to their heart's content.
When this speaker is picked up and suspended from the table, there will still be a faint sound, similar to the sound made by headphones that amplify the volume; while when placed on the table and applying pressure with your hands, When the time comes, it makes a more "steady" sound and has a bit more flavor. Therefore, it is recommended that if you really want to buy it and listen to it at home, it is best to put some heavy objects on it.
FREEDOM DRIVER FD-500i, placed on the table, makes our eyes shine. This is the crystallization of new concepts and bold innovations. It can turn any solid object around it into a sound generator. , use our full imagination to experience the different sound quality experiences brought by various materials. Can it be accepted by ordinary consumers in the market? Or is it easier to survive in those special field applications, such as underwater, parks, and health care equipment? Let’s wait and see!