What is the difference between Bluetooth microphone and 2.4G teaching microphone? What is the difference between Bluetooth microphone and 2.4G teaching microphone? Is there any brand you can recommend

If you are using it for teaching, the reason why you are considering these 2 types of products should be because of the interference issue. Because they both claim to be interference free for mass use, solving the biggest headache of traditional wireless.

There are 2 types of 2.4G, one is auto frequency pairing and the other is fixed band. The principle is similar to the traditional U-band microphone. Effectively, each has its own characteristics, from the principle will be, 2.4G can sound good, but how to do in practice, it depends on the ability of each manufacturer.

For the fixed-band, interference is inevitable, and traditional wireless is no different, in addition to the carrier band is different.

For automatic frequency pairing, there are two kinds, one is to receive the transmitter do not have to set the frequency, one is to transmit without setting, receive set the frequency.

The first one, receiving and transmitting without setting frequency, is what we want. When it comes to this kind of product, you need to test it carefully, and you need 2 sets of them, put them in neighboring classrooms. Turn on the microphone switch to see which classroom is connected, and then go next door to see if there will be crosstalk. When connected, you also need to see if the penetration is too strong to connect to the next door, or if it is too weak to receive the iron cabinet inside the connection.

The second type, the receiver set frequency, the transmitter does not need to set. Realization of the principle of a variety of frequency hopping technology, infrared frequency technology and so on. These products are generally set on the receiving end of the frequency of the dipswitch, there are 232 adjustments, there are also hidden, look as if you do not need to set the frequency. Since the set frequency, it will involve crosstalk. A few sets are fine, but if you use it on a large scale, you have to think about it, and in any case, you have to skip the neighboring frequencies when you install it.

Referring to the Bluetooth microphone, I am more interested in this product, there is a do this product in Shanghai, the brand is Echor, the company name I forget, our school on a lot. Before purchasing our school tested a lot of these products. Specific brands I'm not at liberty to say here, in short, there are brands are tested.

On the initial intention of these products is due to, our school classrooms, for teachers on the demand for sound reinforcement, if on the traditional microphone, interference crosstalk is more serious, and our management teacher can not manage over.

We are mainly concerned about several aspects of the following to take us now with this product to match the description:

1, interference problems. This is the most important, if the interference crosstalk can not be solved, then it will only cause teaching accidents, so I just said a lot of this problem, I hope you can pay more attention to the procurement time. Here by the way, Bluetooth and other 2.4G a little difference, Bluetooth has a standard, SIG, any Bluetooth to meet this standard, why Bluetooth anti-interference is strong, Bluetooth using FHSS frequency hopping spread spectrum technology, to give a simple example, Bluetooth is like a car on the road with a steering wheel, encountered in front of the car can be changed to a lane, and the majority of the 2.4G car is not a steering wheel, this is the difference between them. This is the difference between them. (Of course, the principle of Bluetooth is more complex than this, Bluetooth, regardless of the frequency or use, the frequency of operation is changing, 1600 times per second)

2, connectivity, crosstalk issues. First of all, the connection, we use Bluetooth amplification can be connected through a layer of tin and can not penetrate the wall. Since it is automatic frequency pairing, then make sure not to let it through the actual wall. And the receiver we use is placed inside the lectern, so it is better to be able to penetrate the tin. The downside of Bluetooth is that you have to wait 10 seconds or so each time you turn it on. Then talk about the serial frequency problem, bluetooth itself has a frequency locking technology, so bluetooth can not be two classrooms at the same time, as if we cell phone through bluetooth file transfer, just one to one. 2, management problems, quality problems. At first I was interested in the microphone built into the head of the microphone, because I was worried that the external head of the microphone is easy to break, and then found that the sensitivity and the effect of picking up most of the bad. However, this Shanghai microphone head quality is good, so far no bad. Our school is issued to each person, so there is no daily management problems. At the end of the semester there will be individual lost phenomenon, but the damage rate is less than the way of mass management. The exact way you use it depends on your school itself.

3, the sound quality problem. Previously, I heard that the Bluetooth sound quality is not good, the bandwidth is only 1M, the sound 8k, there is a delay or something. Later, after investigation and testing, the following conclusions, if the use of Bluetooth 2.1 + EDR, the bandwidth can reach 2M, the transmission of CD sound quality is not a problem, the Bluetooth effect can be adjusted through the internal software and external hardware collocation, the effect of the earlier years of the trial of the machine is not how, but we are now using the effect of a very good. For the delay, for more than 70ms delay, teaching can not be received, less than 70ms will not have any effect, bluetooth delay of about 20ms. And 2.4G 10ms is not much different, the average human ear is not heard.

4, by the way, radio equipment, there must be radiation, I personally recommend the procurement of radio-certified products (we use the product because of small, close to the chest, so this is also mandatory at that time), there is also a, Bluetooth power consumption seems to be lower than the general 2.4G amplification to a lot of your purchases can be actually tested.

Last sentence: wrote so much, be sure to thank me. I hope I can bring benefits to everyone with this product!