Cisco DX70 Administrator's Manual page 36

Cisco DX70 and DX80

Introduction
Set up Intelligent Proximity for content sharing
Ultrasound emission
Cisco video systems emit ultrasound as part of the Proximity
feature.
Use the Proximity > Mode setting to switch the Proximity feature -
and thereby also ultrasound emission - On and Off.
Most people are exposed to ultrasound more or less daily in many
environments, including industry, commercial applications and
home appliances.
Even if airborne ultrasound may cause subjective effects for some
individuals, it is very unlikely that any effects will occur for levels
below 75 dB.
Room 70, Room 55, Room Kit, Room Kit Plus, SX10N and MX
Series:
• The ultrasound sound pressure level is below 75 dB at a
distance of 50 cm or more from the loudspeaker.
DX70 and DX80:
• The ultrasound sound pressure level is below 75 dB at a
distance of 20 cm or more from the loudspeaker.
Codec Plus, SX10, SX20, and SX80:
• We cannot foresee the ultrasound sound pressure level on
these video systems, because they emit ultrasound on third-
party loudspeakers.
The volume control on the loudspeaker itself, and the
Ultrasound > MaxVolume setting affect the ultrasound sound
pressure level; the volume control on the remote control or
Touch controller does not have any effect.
D15362.06 DX70 and DX80 Administrator Guide CE9.2, NOVEMBER 2017.
Configuration Configuration Peripherals
Headsets
DX70, DX80, and SX10N:
You can always use a headset with these systems because:
• DX70 and DX80 have dedicated headset outputs, on which we
never emit ultrasound.
• SX10N plays ultrasound on the built-in loudspeakers.
Ultrasound is never emitted on the HDMI or audio outputs.
Room 70, Room 55, Room Kit, Room Kit Plus, Codec Plus, SX10,
SX20, SX80, and MX Series:
• These systems are not designed for headset use.
• We strongly recommend you to switch off ultrasound emission
if you use a headset with these video systems (set
Mode to Off). Then you cannot use the Proximity feature.
• Since these systems don't have dedicated headset outputs,
we are not able to control the sound pressure level from the
connected headsets.
Audio >
Maintenance
(page 3 of 5)
36
Administrator Guide
System settings
Proximity >
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Appendices