Environmental noise canceller, noise suppression device, NSD

ENC (Environmental Noise Cancellation) is a technology used for active suppression of environmental noise in audio devices such as headphones and microphones. The operating principle of ENC is based on the use of microphones to capture sounds from the surrounding environment and signal processing algorithms to generate an anti-phase audio signal that compensates for external noise. This function blocks external noise during headset conversations and ensures high-quality voice transmission through the microphones integrated into the headphones.

In contrast to the ANC function, which reduces the amount of background noise you hear in your headphones alongside music or a caller’s voice, ENC reduces the level of noise picked up by the microphone during a conversation.

Environmental noise suppression (ENC) and active noise cancellation (ANC) are methods used to suppress unwanted noise during audio communication. However, they differ in their approach and effectiveness. ENC technology is aimed at eliminating background noise through sound insulation or acoustic isolation. It is designed to create a controlled audio environment by reducing external noise and limiting the transmission of environmental sounds into the microphone. Thus, ANC improves the sound for you, while ENC improves it for the person you are speaking with on the phone. ENC is an advantage enjoyed by others.

Main stages of ENC operation include:

Sound capture: Built-in microphones in the device capture sound from the environment, including noises from vehicles, people, air conditioners, etc.

Signal analysis: The received audio signal is analyzed by special signal processing algorithms to determine its spectral characteristics and noise level.

Anti-phase signal generation: Based on the analysis of the external noise, the device generates an audio signal with an opposite phase or frequency response to compensate for the external noise.

Signal mixing: The anti-phase signal is mixed with your voice picked up by the headset microphone so that the external noise is reduced or completely blocked for the user on the other end of the line.

Adjustment and adaptation: Some ENC systems can additionally adapt noise suppression parameters in real time depending on the changing environment or user preferences.

Thus, ENC makes it possible to reduce the level of external noise captured by the microphone and to increase the clarity and intelligibility of your voice in a noisy environment.