1
Total Noise Suppression Ratio (Typical values)
Plane
Mode A
Train/Bus
Mode B
Office
Mode C
1.0 dB (9. %)
1. dB (9. %)
1. dB (9.9 %)
Based on Sony’s noise source simulations
20
50
100
200
500
1k
2k
Ener
gy
Frequency
Plane noise
When wearing headphones
(NC ON)
This area is equivalent to
the canceled noise energy