What Affect Your Bluetooth Earphone's Signal

What affect your Bluetooth Earphone's Signal?


Bluetooth wireless communication technology as an open global standard for wireless data and voice communications,the first application was to replace the headphone cable in the field of voice communication.

Until the 4.0 version of the low-power Bluetooth technology is widely used in smart wearable devices and smart home devices, these are gradually upgraded from the original Bluetooth headset era, and now the smart devices for Bluetooth technology applications are more and more popular.

Many friends have encountered such problems when using Bluetooth devices. The signal is intermittent, sometimes strong and sometimes weak, affecting the use of the device. What caused this? Today we have a introduction to the phenomenon of signal difference between Bluetooth receivers.

Bluetooth is a wireless technology standard for exchanging data between fixed and mobile devices over short distances using short-wavelength UHF radio waves in the industrial, scientific and medical radio bands, from 2.400 to 2.485 GHz, and building personal area networks (PANs).

Moreover, Bluetooth is a radio technology that supports short-range communication of devices (maximum transmission distance of 100 meters), which can effectively simplify communication between mobile communication terminal devices, thereby making data transmission more rapid and efficient, it uses a decentralized network structure. As well as fast frequency hopping and short packet technology, it supports point-to-point and point-to-multipoint communication.

The 100 meters mentioned here refers to the maximum transmission distance and is in the condition of no obstruction.From the above, we can speculate that the possible reasons for the bad Bluetooth headset signal are as follows:

1.The Bluetooth Version - The Bluetooth version is an important aspect that affects the connection of Bluetooth headsets. The higher the Bluetooth version, the faster and more stable the signal transmission, and In the process of talking and listening to songs, consumers will encounter fewer signal disconnection and sound jams. At present, Bluetooth headset products on the market generally use Bluetooth version 4.2, and some mid-to-high-end products have been adopted Bluetooth version 5.0.

2.The quality of the headphone, if it is not good, the Bluetooth transmission effect will also affect;

3.Because the human body and clothing are blocked, the Bluetooth transmission is blocked;

4.The Bluetooth earphone battery is about to be empty, and the transmission capacity is degraded.

So in the process of inspection, we can find that these methods can solve the problem of poor signal. The position of the mobile Bluetooth headset, if the signal changes with the position change, the possible reason is "The third point"; if the signal does not change significantly, the earphone is charged, and the effect is tested after full charged; if the above two points are all tested, It is the problem of the transmission capacity of the Bluetooth earphone itself (quality problems and service life problems), which can be replaced or repaired as appropriate.

Of course, there is also a situation where Bluetooth and Wi-Fi signal interference problems may have been encountered. Both of them mainly use the 2.4GHz frequency band. When both are turned on, the data throughput of Bluetooth will drop sharply, and the pairing equipment is difficult. Wi-Fi is intermittently interrupted and the network is limited. At present, there is basically no way to deal with this problem, but you can temporarily solve some problems for you by the following scheme.

Method 1: Connect to a 5GHz wireless network
Now that you know the problem is in the band conflict, consider buying a dual-band (2.4GHz+5GHz) router and connecting to a 5GHz Wi-Fi network. This method can completely solve the interference problem, but cost a lot of money.

Method 2: Replace the Wi-Fi channel
Take the TP-Link router as an example. Log in to the router web management page and find the channel option in Wireless Settings -> Basic Settings and change it to any of 1, 6, and 11. These are 2.4 GHz non-overlapping transmission channels, which are more stable than other channels.

Method 3: Turn on the NIC Bluetooth coexistence function
In the wireless network cards produced in recent years, Bluetooth coexistence is supported. The method is to find Bluetooth Collaboration or Bluetooth Coexistence Mode (name may be different) in the Advanced tab of the network adapter properties, and set it to Enable. Windows will automatically reconnect to Wi-Fi, and the interference with Bluetooth will be alleviated.

Method 4: Keep away from interference sources
Separate the Bluetooth terminal from devices that use the 2.4 GHz band, such as routers, microwave ovens, and cordless phones.

Are Earphones Bad For Our Hearing And Body

Nowadays, headphones & earphones have become a important “friend” for everyone. When we are having a relax, working, playing games, and learning lessons, we all cannot leave without it. And with the launch of wireless Bluetooth earphones, now the earphones are more popular and most people love it.

But with the continuous development of headphones, what damages does the headphone cause to our body? Many people say that wearing headphones for a long time will damage hearing. Is this correct? And does the wireless Bluetooth earbuds have radiation problems?

Wearing headphones for a long time can damage your hearing?


Like other senses, there is a special hearing "receptor" in the ear - the ciliated cells in the cochlea. The reason we can hear the sound is because the ciliated cells are stimulated, and oscillate as the sound vibrates. However, once the cilia swings too much, the sensitivity is reduced and it will damage the hearing in the long run. This damage is gradual, and there is no obvious hearing change at the beginning, so it is always easy to be ignored. Once it is discovered, it is too late.

Relevant medical data also shows that when the volume heard by the human ear exceeds 85 decibels, the longer time can cause hearing fatigue. When the volume is above 110 decibels, it is enough to cause the hair cells of the human ear to die, and in severe cases, it can cause deafness.


So how do we prevent the damage that headphones bring to us?
Expert advice: "Do not wear headphones for more than 1 hour, the intensity should not exceed 2/3 of the maximum volume."

Do you want to use headphones and want to protect your hearing? Then remember these five points:

• 1.Noisy occasions, do not listen

When the outside noise is large, in order to hear the sound in the earphone, we will increase the volume unconsciously, which will increase the damage.

• 2. Quiet occasion, low volume listening

In a quiet environment, just set the volume to be clear.

• 3.Limit the maximum volume

When using the headphones, never turn the volume up to the maximum, preferably no more than 2/3 of the maximum volume.

• 4.The head design headphone is relatively safe

The headset has a large contact area and a small pressure, which is relatively less irritating to the cochlear ciliated cells and is relatively safer.

• 5. Avoid listening for a long time

To get rid of the bad habit of using headphones for a long time, WHO recommends that it is safer to not exceed 1 hour each time.
If you feel tinnitus, hearing loss, pain in your ears, and secretions, please go to the ENT department for further treatment as soon as possible.


Does the wireless Bluetooth headset have radiation problems?
What is radiation?
Radiation refers to the phenomenon that part of the electromagnetic energy emitted by the field source propagates away from the field source and then returns to the field source, and the energy spreads out in the form of electromagnetic waves or particles (such as alpha particles, beta particles, etc.). Radiation itself is a neutral word, the name of energy transmission, and light is also a kind of radiation. Everything in nature, as long as the temperature is above zero in absolute temperature, such as the human body, is constantly transmitting heat in the form of electromagnetic waves and particles. This way of transmitting energy can be called radiation.


What is common radiation?
Radiation is divided into solar radiation, electromagnetic radiation and thermal radiation. Common electromagnetic radiation is emitted by electrical appliances. Any consumer has electromagnetic radiation, such as a light bulb. When the electromagnetic wave radiation intensity exceeds the standard amount, it will have a negative effect, causing different diseases of the human body, which may cause harm to human health. This part of the electromagnetic wave radiation exceeding the standard amount is electromagnetic radiation pollution.


What is the radiation value of the Bluetooth headset?
Expert organizations such as the World Health Organization and the IEEE said that the radiation of the Bluetooth headset was not found to be harmful to the human body.

The output power of the Bluetooth product is about 2 milliwatts, which is one-millionth of the power used by the microwave oven. It is one-thousandth of the power of the mobile phone (mobile phone). The radiation of Bluetooth headsets are more safe for the human body, and children and pregnant women can use it with confidence.


Of course, the output power is set to achieve its design purpose. The transmission distance of the Bluetooth headphone is about 10 meters, so only a very low power can be used to achieve the purpose of 10 meters transmission, and because the power of the Bluetooth headset is small, Its penetration ability is also limited.

In fact, the radiation of the Bluetooth earphone is almost negligible. For example, the fluorescent light in your room is larger than the radiation from the Bluetooth headset. Bluetooth headsets have low radiation, which is one of the reasons why many people are optimistic about Bluetooth headsets.