How can headphones actively reduce noise when receiving important information in noisy environment?

Headphones with active noise reduction function are a great invention, which allows us to concentrate only on our favorite music world in a noisy environment. However, sometimes it also brings certain dangers. For example, headphones filter out important sounds around you, such as someone calling your name, siren or car horn, which is not safe. Now a new patent of Amazon can help us avoid these potential dangers.

At present, the new patent of the online retail giant can turn off the noise reduction function when the earphone starts the noise reduction function, and when it encounters the sound of a specific frequency or the specified keywords and phrases, so that more useful information can reach the wearer's ear.

It is reported that the patented headset can collect the surrounding sound through the built-in microphone, similar to the voice feedback system of Amazon Alexa, which can receive the surrounding environmental sound effects and then respond in the first time. The inventor of this patent is Benjamin Scott, who has worked in the Alexa team for more than three years.

This system can recognize the wearer's name or special phrase through a special algorithm, and can also unlock warning sounds such as car horns when crossing the road.

Although we don't know when Amazon's patent will be applied to actual products, if this function is really used in noise-canceling headphones, it will undoubtedly improve the safety factor of the wearer, which is a very useful patent invention.