Edifier W828NB Noise Cancellation Performance | Qualcomm aptX
Edifier W828NB Active Noise Cancellation Capability
Active noise cancellation is conceptually simple. One or more microphones pick up ambient noise, which is used to generate opposing sound waves that cancel out the noise before it reaches the user’s ears.
However, it has not been easy or cheap to implement. For one thing – noise detection and the generation of its opposing sound waves happens in real-time.
It is complicated by the need to mix the noise-cancelling sound waves with the actual audio output (of your song or movie), and deliver the output without any noticeable lag.
From what we can tell, the W828NB uses analogue negative feedback circuitry to generate its noise cancelling sound waves.
Analogue noise cancellation is simpler and cheaper to implement, but limits its active noise cancellation to the lower frequencies.
For active noise cancellation of higher frequencies, they would need to add a fast digital signal processor to handle the complex noise cancellation algorithms.
Edifier W828NB Noise Cancelling Performance
Before you watch the video, please keep in mind that it was quite impossible to fully isolate our microphone in the ear cup. So the actual effect is more pronounced than what you’ll hear in this video.
In the airplane cabin clip, you can distinctly hear how the W828NB cuts out the low-frequency rumble, but the higher-frequency sound of the air-conditioning is still audible.
Turning on active noise cancellation will markedly reduce low-frequency noise. This gives you a better appreciation of whatever you are listening to. However, this includes voices of people around you. In fact, airline announcements were clearer with ANC turned on, than turned off.
However, we noticed some static feedback whenever the plane landed. It always happened right after the plane touches down – it’s as if the static feedback is caused by the sound of the airplane’s tyres. It tapers off as the plane slows down.
Its Bluetooth 5.0 connectivity is more than twice as fast as the W860NB‘s Bluetooth 4.1, allowing it to deliver audio data at lower latencies. It also uses less power.
This should let the W828NB avoid audio synchronisation problems that sometimes affects Bluetooth 4.x devices.
It is also the reason why the W828NB can wirelessly play music for 80 hours (without ANC), compared to just 45 hours for the W860NB.
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