  In this study, we present a new experiment in order to study the Lombard
effect in telepresence robotics. In this experiment, one person talks with a
robot controled remotely by someone in a different room. The remote pilot (R)
is immersed in both environments, while the local interlocutor (L) interacts
directly with the robot. In this context, the position of the noise source, in
the remote or in the local room, may modify the subjects' voice adaptations. In
order to study in details this phenomenon, we propose four particular
conditions: no added noise, noise in room R heard only by R, virtual noise in
room L heard only by R, and noise in room L heard by both R and L. We measured
the variations of maximum intensity in order to quantify the Lombard effect.
Our results show that there is indeed a modification of voice intensity in all
noisy conditions. However, the amplitude of this modification varies depending
on the condition.
