User Manual

Unified Communications Microphone & Speaker System
YVC-1000 White Paper
15
6. Automatic Room EQ
6.1 What is automatic room EQ?
The automatic room EQ is a function which automatically responds to the acoustic properties of a room and applies
equalization to the speakers to facilitate the listening of reproduced sounds. YVC-1000 uses voice signals during
conversations, and can even make real-time and automatic adjustments, however the automatic acoustic
adjustment functions (refer to 2) of 2.2 in Chapter 3) can also be implemented, so the settings can be optimized in
advance prior to the start of conversations.
6.2 Superiority of YVC-1000
The YVC-1000 automatic room EQ has two mechanisms. One is a mechanism that cuts the superfluous upsurge in
low sounds, and the other one is a mechanism that cuts the large band frequency of the reverberation. Since the
superfluous upsurge in low sounds might impede (masking) the listening of midrange sounds, the listenability of
voices is improved by cutting superfluous low sounds. In addition, since even superfluous reverberation
components impede (masking) the listening of trailing voices, the listenability of voices is improved by cutting the
large band frequency of reverberations. Commercial conventional systems are not equipped with these kinds of
functions which respond to the acoustic properties in the usage environment and automatically apply equalization.
< Performance validation >
Validation results:
1) Case in an excessive bass boost environment
The difference in transmission characteristics between the presence and absence of automatic room EQ was
validated in an excessive bass boost environment. The transmission characteristics of a room are the audio
frequency response of sounds transmitted from the speakers to a user location that are determined by the shape of
the room and the positional relationship between the speakers (YVC-1000 built-in and external speakers). This
validation data was measured via the premise that the user's location is equal to the microphone’s location. Graph
2-6 expresses that the higher up the longitudinal axis the frequency band goes the more that the loud sounds are
conveyed.
(Graph 2-6)
As the graph shows in the shaded in yellow section between ① and ③, it is clear that excessively-boosted bass is