Sony MDR-NC300D Product Information page 13

The digital equalizer suppresses the impact on the sound quality and delivers high quality sound that gives full play to the intrinsic
performance of the driver unit.
By applying the high-precision, high-sound quality digital equalizing technology accumulated through Sony's AV amplifiers and
Hi-Fi audiovisual apparatus and adopting the newly developed computation method optimized to the system, it is possible to
reproduce a music source with a sense of realism from deep bass to smooth highs.
Characteristic of acoustical system
Frequency
Characteristic of digital equalizer
Frequency
Total characteristic
Desired
characteristic
Frequency
1