Principle of Active Noise Cancelling Office Headphones

In today's fast-paced world, noise pollution is everywhere. From open office environments, busy commutes, to frequent business trips, noise has become a constant annoyance for many in their daily lives. To escape this disturbance, headphones, which were initially designed simply for listening, have evolved into Active Noise Cancelling (ANC) office headphones, becoming essential gear for office workers. Whether to solve office noise problems or enjoy pure music, active noise cancelling technology provides us with the ideal solution. But what exactly is active noise cancelling? And how does it work?

Principle of Active Noise Cancelling Office Headphones

Sound is a wave. In simple terms, when two waves moving in opposite directions meet, their peaks and troughs overlap and cancel each other out. This principle is the foundation of active noise cancelling office headphones. The headphones generate a sound wave that is the opposite of the external noise wave, effectively eliminating the noise. It's like playing Tetris—if there's a concave noise wave, the headphones will emit a convex wave, and when these two waves overlap, the noise is cancelled out.

How Active Noise Cancelling Office Headphones Work?

The working process of active noise cancelling office headphones is roughly as follows: first, the noise in the environment is captured by a noise-cancelling microphone inside the headphones. The signal is then processed by the active noise cancelling chip to generate a 180° out-of-phase sound wave. This reversed wave is transmitted through the headphone speakers and reaches the ear, where it creates a phase difference with the noise, effectively cancelling out the external sound and reducing noise.

Types of Active Noise Cancelling Headphones

Based on their working principle and design structure, active noise cancelling headphones can be categorized into three types: Feedforward ANC, Feedback ANC, and Hybrid ANC.

Feedforward Active Noise Cancelling

Feedforward headphones use a microphone placed closer to the noise source than the speaker. The external microphone captures the reference noise signal, and then a Digital Signal Processor (DSP) generates the opposite noise signal, which is then emitted by the speaker to cancel out the noise.

Feedback Active Noise Cancelling

Feedback headphones place the microphone closer to the ear than the speaker. It captures the original noise inside the headphones and the mixed signal of the reverse noise, then processes it with DSP to generate the opposite noise, which is emitted by the speaker, further cancelling out the sound.

Hybrid Active Noise Cancelling

Hybrid headphones combine the advantages of both feedforward and feedback systems. They provide excellent noise cancelling performance while adding more complexity. By integrating both control systems, hybrid headphones can more precisely handle environmental noise and achieve a higher efficiency in noise reduction.

ADDASOUND's EPIC 501/502 UC headset is an active noise cancelling office headset, designed with an elegant appearance and ergonomic structure to provide long-term comfort. The included busy indicator light alerts others to avoid disturbing you, allowing you to stay more focused on your work. The EPIC 502 also offers stereo sound, enhancing audio quality and helping users enjoy a more efficient, distraction-free workday. Through this multifunctional design, the ADDASOUND EPIC series ensures that users experience high-quality sound while keeping their hands free, ultimately improving work efficiency.

As modern life increasingly demands noise-free environments, active noise cancelling office headphones have become an essential tool for many. Whether in noisy offices, public transport, or any environment requiring focus, active noise cancelling headphones help block out external noise, providing a peaceful space for working or enjoying music. With continuous technological advancements, noise cancelling headphones will only become more efficient, delivering an even better listening experience.