What Active Noise Cancellation Can Hear and Counter
What Active Noise Cancellation Can Hear and Counter
Headphones use microphones and processing to reduce sound before it reaches the ear.
Microphones pick up surrounding sound or measure what remains inside the ear cup. The electronics generate a signal intended to cancel part of the unwanted pressure at the listener's ear.
Steady low frequencies are often easier to reduce than sudden voices. Fit, glasses and wind across the microphones can change how well the system works.
Try the same headphones with transit rumble, conversation and a quiet room. Listening across different conditions reveals both the amount of reduction and any hiss or pressure sensation.
