According to foreign media appleinsider, the US Patent and Trademark Office announced a patent filed by Apple on Tuesday. This patent describes the use of bone conduction to deliver audio to the user. Appleinsider said the technology may be used in some future AirPods in the future.

Apple Applies for Bone Conduction Patent Is Exposed, Which May Be Used in AirPods Series Products in the Future-askpower

The introduction of the patent, the picture is from the US patent and trademark website

In the background description of the patent, Apple explained this technology as: bone conduction headphones allow users to hear sounds through the vibration of the user’s skull. Through bone conduction, sound signals can be directly transmitted to the user’s ears through contact. Different types of bone conduction earphones can achieve sound transmission by touching different parts of the user’s head and passing through different parts of the user’s skull. Compared with air conduction headphones, bone conduction headphones have many advantages.

Apple Applies for Bone Conduction Patent Is Exposed, Which May Be Used in AirPods Series Products in the Future-askpower

The two pictures in the patent, the picture is from the patent content

There are many bone conduction earphones on the market, but these earphones have not been popularized due to various reasons. Bone conduction is a way of conducting sound waves to the inner ear. With bone cells, sound waves directly pass through the skull to cause the perilymph to produce corresponding fluctuations to stimulate the cochlear spiral organs to produce hearing. This technology does not require air, so it is suitable for people who have difficulty hearing or whose outer ear is damaged, and who work underwater.

In addition, bone conduction is only suitable for transmitting sounds with frequencies of 4000 Hz and below, and the high frequency of bone conduction sounds will make it difficult to distinguish information, and the coverage of human hearing is about 20Hz to 20000Hz, so bone conduction is not suitable for all scenarios.

The patent was filed in May 2018 and was published by the US National Patent Office yesterday. Apple had previously registered bone conduction noise reduction technology. This technology may only be used as Apple’s technical reserve, but it does not rule out the possibility of Apple’s use in a certain model of headset in the future.