Outstanding Noise Canceling Performance; Principles Of Noise Canceling Mechanism - Sony MDR-NC300D Product Information

2. Outstanding Noise Canceling Performance
2-1 Principles of Noise Canceling Mechanism
The MDR-NC300D headphones are equipped with a feed-forward noise canceling (NC) mechanism which cancels noise near the
eardrum by estimating what kind of noise it will be when it reaches the eardrum based on the ambient noise collected by the noise
detection microphone, and generating an inverted sound waveform.
As shown in the figure, the noise canceling performance greatly depends on the efficiency and precision of the NC circuit to
generate the noise canceling waveform.
The NC circuit uses the newly developed integrated DNC processor <CXD9952GR>. Compared with the previous analog type, it
boasts excellent noise canceling performance and outstanding sound quality.