Bone conduction earphone
Today, I want to talk about a very magical earphone, bone conduction earphone.
As the name implies, bone conduction is a way of sound transmission, which converts sound into mechanical vibration of different frequencies, and transmits sound waves through human skull, bone labyrinth, lymphatic transmission of inner ear, spiral apparatus, auditory nerve and auditory center.
New Headphones for Bone Conduction
Compared with the classical sound transmission method which generates sound waves through vibration membrane, bone conduction eliminates many steps of sound wave transmission, achieves clear sound restoration in noisy environment, and the sound wave does not affect others because it diffuses in the air. Bone conduction technology is divided into bone conduction loudspeaker technology and bone conduction microphone technology.
(1) Bone conduction loudspeaker technology is used to listen to the voice. Air-guided loudspeakers convert electrical signals into sound waves (vibration signals) and transmit them to the auditory nerve. The bone conduction loudspeaker is the acoustic wave (vibration signal) transformed by electrical signals, which is transmitted directly through the bone to the auditory nerve. The transmission medium of sound wave (vibration signal) is different.
(2) Bone conduction microphone technology is used to deliver a message, which is to collect sound. Air conduction is the transmission of sound waves through the air to the microphone, while bone conduction is the direct transmission through the bone.
New Headphones for Bone Conduction
The earphones made with these bone conduction technologies are called bone conduction earphones. They are also called bone conduction earphones, bone sensing earphones, bone transmitting earphones and bone sensing earphones.
Bone conduction headphones are divided into bone conduction speaker technology headphones and bone conduction microphone technology headphones.
(1) Headphones for bone conduction loudspeaker technology:
Bone conduction technique was used to listen to the bone and sound waves were transmitted directly to the auditory nerve through the bone. Therefore, both ears can be opened without harming the tympanic membrane. In the military and civilian fields, the cheek bones are usually used to transmit sound directly.
(2) Headphones for bone conduction microphone technology:
Sound is collected by bone conduction technology, and sound waves are transmitted to the microphone through the bone. In the civil field, bone conduction technology is generally used to reduce noise.
Because of the need of military scene, sometimes we can't speak loudly, and the loss rate of sound transmission in bone is far lower than that in air transmission, while bone transmission microphone technology headphones mainly use throat bone transmission. Because of the close distance, the loss is low. A soldier needs only a small voice to deliver the desired command accurately.