Sony MDR-NC500D - Manual (Page 9)

9 GB
GB
The characteristics of environmental noise vary with the scene to be used.
In an airplane, for example, low and midrange frequencies can have a large noise energy
and other frequency ranges have a smaller noise energy.
On the other hand, in the environment such as an office, the noise energy is small but
distributed over a wider range.
In MDR-NC500D, the filter circuit to control a noise canceling ratio was digitized and it
is controlled by software.
This enables the filter characteristic to be switched: AI Noise Canceling function with
which MDR-NC500D selects automatically the filter characteristic (noise canceling mode) that
is the most suitable for the user's environment.
3.AI Noise Canceling Function
NC MODE A
Noise mainly in an airplane is effectively
reduced.
Frequency
Noise canceling ratio
* Manual mode selection is also possible.
AI Noise Canceling function
Digital technology allows selection from multiple
noise canceling modes.
The headphones analyze the outside noise and
automatically select the optimal canceling mode.
NC MODE B
Noise mainly in a bus or a train is effectively
reduced.
NC MODE C
Noise mainly found in an office environment
(PC, copier, air ventilation, etc.) is effectively
reduced.
Continued