Technology empowers, directional sound helps hearing protection

Hearing is an important sense for us to understand and perceive the world. Once damaged, it is irreversible and will have a great impact on the body and mind. WHO calls on governments to take action to incorporate ear and hearing care into the country plan as part of universal health coverage.

Nowadays, everyone pays attention to privacy. Whether it is at home or public space, work or entertainment, headphones have become the first choice for obtaining audio sources. However, wearing headphones for a long time will cause more or less hearing damage to a certain extent; and Due to the prevalence of hearing loss in the elderly population. In daily life, the elderly often make up for the lack of hearing by turning up the volume of the sound. However, the excessively high volume will not only cause a certain degree of distress to the family members around them, but also invisibly damage the hearing of themselves and their family members to varying degrees.

In today's 21st century technology era, BESTAR directional audio realizes the directional transmission of audible sound, creates an independent audio space around the human ear, and can clearly obtain sound information without wearing headphones. An independent, non-interfering sound area, efficient and environmentally friendly to complete the dissemination of information.

The characteristic of this kind of directional sound is that within a certain distance, the sound will not be attenuated, as if it is always sounding in your ear. For example, within 0-20m, the volume of the sound you hear in any distance range is basically the same. A directional sound transmitted in a 30-degree angle range, theoretically, the sound is very small or inaudible outside the 30-degree angle. This directional sound is like a flashlight. In theory, it is basically inaudible next to and behind the sound source. It can only be heard within a 30-degree angle. Even if your two ears are at different angles, the sound you hear will be significantly different.

This kind of directional sound is very different from the sound produced by ordinary speakers. You can totally think of it as a flashlight. What happens when we put a thin piece of paper in front of a glowing flashlight? There is no light or darkness behind the paper. Likewise, what if a piece of paper is placed in front of the sound path where the directional sound travels? The sound behind the paper will also be so small that you can't even hear it.

According to the acoustic theory, the higher the frequency of the sound wave, the better the directivity during its propagation.

The working principle of the directional sound is: by modulating the audio signal on the ultrasonic carrier, the directional propagation of the audible sound is formed by using the characteristics of the directional propagation of the ultrasonic wave and the nonlinear effect of the air. Compared with traditional sound sources, directional sound sources can control the propagation direction of the sound source and control the coverage of sound waves.

This is directional sound technology.

The effective frequency range of BESTAR directional audio is 800-20K Hz, and the sound pressure attenuation within 15° of the product is >15dB. Not only that, the working current of BESTAR directional audio: <1A, less power consumption , and the product can be used in a working environment of -30 ° C ~ 75 ° C, whether it is in high temperature or severe cold weather, it does not affect the stability of the sound transmission of the product, which means that the sound has a higher directivity and sound diffusion angle. Small, pointing to a more stable spread.

▲BESTAR's BDS-01 directional loudspeaker

BESTAR directional speakers give full play to the advantages of the product, the sound field between areas is independent, does not cause noise interference in other areas, scientifically protects the ears, and can obtain sound information without turning up the volume, creating a healthy and good space environment. In the future, directional audio solutions will be widely used in people's daily life and work.