1. What is the working principle of bone conduction bluetooth earphones?
The transmission medium of sound includes solid, liquid and air, and in general, the way sound waves are transmitted to the human inner ear There are two ways of air conduction and bone conduction. Air conduction is the well-known sound wave transmitted to the middle ear through the pinna and external auditory canal, and then transmitted to the inner ear through the ossicular chain. Bone conduction is the vibration of sound waves through the skull, jaw and other head bones to transmit sound to the inner ear. Bone conduction is another very important way of hearing in addition to air transmission. People have made many bone conduction hearing devices by using this method.
Traditional earphones mainly transmit sound through the air, while bone conduction earphones use the temporal bone of the head to transmit sound, and finally conduct sound directly to the auditory nerve in the form of sound waves. It is no longer necessary to travel through the air first to the eardrum and then to our auditory nerve.
At present, bone conduction hearing devices mainly include electromagnetic bone conduction earphones and piezoelectric bone conduction earphones. Electromagnetic bone conduction earphones work well, but electromagnetic bone conduction earphones have electromagnetic radiation, which is easy to cause harm to the user’s body. Piezoelectric bone conduction earphones use piezoelectric vibrators as sound-generating components, and the human body is less affected by electromagnetic radiation during wearing, and has the advantages of small size and low power consumption.
2. Advantages of Bone Conduction Bluetooth Headset
1. The principle of bone conduction headset determines, bone conduction Bluetooth headset There is no need to transmit sound through the ear canal, so there is no need to cover the ears or block the ear canal to achieve the purpose of listening to the sound like traditional headphones, so “open-ear listening” has become one of the most praised advantages of bone conduction headphones. one.
These advantages play a big role in sports scenes, such as when you use bone conduction headphones to listen to music, you can also hear the ambient sound around you, so that users will not be in the In the state of “ear blindness”, especially in outdoor sports, “open ears” can avoid some dangerous situations, which is also the most worthy of the advantages of bone conduction headphones.
2. Since the bone conduction sports headphones do not need to use both ears, it also brings some health benefits. Because bone conduction earphones do not need to put earplugs in human ears, it can keep the inside of the ear canal clean and hygienic. At the same time, the surface of bone conduction earphones is smooth and easy to clean, while traditional air conduction earphones are easy to deposit bacteria. Therefore, bone conduction earphones are easy to deposit. Headphones are also very helpful for the health of the ears.
3. When we are exercising, listening to songs can effectively relax our body and mind and achieve a better exercise effect, but ordinary wired headphones will transmit the sound of friction and collision to the ear through the headphone cable during exercise. Internally, this is what we often call the “stethoscope effect”, and bone conduction headphones avoid this problem and give people a better sports music environment. Of course, if you want to completely get rid of the interference of “auscultation sound”, a true wireless Bluetooth headset is the most ideal choice.
Three. Disadvantages of bone conduction earphones
1. The main positioning of bone conduction earphones has always been “sports earphones” , not only shows its advantages in sports scenes, but also shows that the sound quality of bone conduction headphones is not up to the level of daily listening headphones (same price), such as insufficient bass, sound leakage and other phenomena still exist, followed by Compared with wired headphones of the same price, there is no price advantage, so people will only use bone conduction headphones in specific scenarios such as sports.
2. If bone conduction There is a common problem with Bluetooth headsets, that is, the problem of sound leakage. Although major manufacturers are currently working hard to improve the sound leakage of bone conduction earphones, from the actual situation of bone conduction earphones, the sound leakage phenomenon still exists in bone conduction earphones, but the sound leakage situation is more serious than before. It has been significantly improved, and it is not bad to occasionally listen to songs in a quiet environment.
3. During exercise, since bone conduction earphones need vibration waves to emit sound, it will have a certain impact on the wearing experience, and this is also some shortcomings caused by the principle of bone conduction earphones.
