City dwellers already have the opportunity to save themselves from the unnecessary noise that surrounds them in everyday life. To do this, you will need headphones with an active noise cancellation system, which are quite effective, but have one significant drawback: they suppress any external sounds, including the appeal of others to the user.
A new Amazon patent describes an intelligent headphone noise cancellation system that avoids this drawback. The system is able to recognize and exclude specified words from filtering. For example, you can program the device for phrases that include your name.
The fact is that, unlike passive noise cancellation (in other words, sound insulation), active noise suppression devices completely protect a person from unnecessary sounds, generating an inverted audio signal. Since such processing is carried out in digital form, there is nothing stopping us from further analyzing the incoming sounds and determining when a given word sounds.
The company is still planning to release products under this patent, but many users already want to purchase such a noise protection system.