User Guide

2023-01 | v2.0
Planning guide for system integrators
TeamConnect Ceiling 2
Sound distribution
The recommended distances for positioning the TCC2 in the room are determined by the inverse
square law (ISL).
This law states that each doubling of the distance from the sound source reduces
the sound pressure level by 6 dB. This means that the sound energy decreases with
the square of the distance from the sound source when distributed over a large area.
The more precisely you adhere to the minimum and maximum distances, the fewer adjust-
ments you will have to make in the system to amplify or attenuate audio signals.
Example:
The TCC2 was installed on the ceiling at a
height of 3 m (10 ft). The maximum distance
to the farthest speaking person is ideally 4m
(13ft) and should not exceed 5m (16ft).
If the person speaking is outside the recom-
mended maximum distance, the audio signal
may be picked up very weakly or not at all. In
this case, the incoming signals would need to
be amplified in the system.
Effects on the sound pressure level:
Distance from the TCC2 Incoming level
4 m (13 ft) 60 dB SPL
5 m (16 ft) 58 dB SPL
6 m (20 ft) 56.5 dB SPL
In the opposite case, the incoming level from
a person standing too close to the unit will be
very high and will need to be attenuated in the
system.
Sensitivity Threshold
The Sensitivity Threshold setting lets you
adjust the TCC2 microphone’s sensitivity to
background noise in order to better identify
the presenter. Depending on the setting, the
sensitivity is either amplified or attenuated:
• Quiet: recommended setting for present-
ers with low speech volume. The sensitivi-
ty of the microphone is amplified.
• Normal (factory setting): recommended
setting for presenters with normal speech
volume.
• Loud: recommended setting for present-
ers with high speech volume (e.g. in a
room with a lot of background noise). The
sensitivity of the microphone is attenuat-
ed.
5 m (58 dB SPL)
6 m (56,5 dB SPL)
4 m (60 dB SPL)
Fig. 20: Simulated view with activated Exclusion Zone
Fig. 21: Setting the sensitivity threshold