User Manual

Unified Communications Microphone & Speaker System
YVC-1000 White Paper
8
2.2 Superiority of YVC-1000
The commercial conventional systems eliminate noise only when there is no voice. However, they are unable to
eliminate noises which coexist with voices. If this is the case, the predecessor generally eliminates steady human
voices and music sounds by regarding them as noises. In contrast, YVC-1000 can eliminate noises even if they
coexist with voices. In other words, with YVC-1000, HVAD is combined into the evaluating of steady sounds, thus
misidentified eliminating such as that by commercial conventional systems is averted, so that just noises can be
eliminated.
< Comparisons with commercial conventional systems and validations >
Validation results:
(Graph 2-3)
Graph 2-3 indicates the measuring of noise reduction capabilities in environments with background noise levels of
48 dB (air conditioners set to high).
With commercial conventional systems it is known that background noise levels hardly drop in the voice zones.
Because of that, the real S/N ratio is 23 dB, and for conventional microphones without noise reduction, the result is
that there is not a large difference. On the other hand, since the YVC-1000 significantly improves the S/N ratio, the
sound quality becomes equivalent to that of a quiet room.
Data measuring method:
In the configurations as in Figure 2-3, an S/N ratio (signal-to-noise ratio) was measured for comparison with a normal
microphone (without noise reduction), YVC-1000 and a commercial conventional system.
* The above validation results were obtained using YVC-1000 firmware Ver.1.05.