Safety Instructions; How Audiobeam Works - Sennheiser Audiobeam Bedienungsanleitung

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Safety instructions

Warning – High Voltage – Risk of Death!
Opening the Audiobeam while it is connected to the mains is likely to result in a life-
threatening electric shock!
There are no user serviceable parts inside – if the Audiobeam should become
defective, any repairs must be carried out by an official Sennheiser Service Partner.
If the unit is opened in breach of this instruction, the warranty becomes null and
void.
Risk of fire!
Audiobeam generates heat! Make sure that the air vents of the unit are not covered
or blocked! Keep Audiobeam away from heat sources and never expose Audiobeam
to direct sunlight! Maintain a minimum distance of 1 meter between Audiobeam
and combustible materials.
Attention!
If liquids or small parts which conduct electricity find their way into the interior or
to the connecting sockets of Audiobeam, this can cause a short circuit! Use
Audiobeam in dry rooms only and keep liquids and small parts which conduct
electricity away from the unit and its connecting sockets. For cleaning Audiobeam,
only use a dry or slightly damp cloth. Never use any solvents or cleansing agents.
Is there a danger of hearing damage?
A new study tested the Audiobeam for possible damage to hearing due to the
ultrasound it emits and certified its harmlessness. In this study, Prof. Dr.-Ing.
Joachim Herbertz, the President of the first International Ultrasonics Congress,
came to the following conclusion:
"The ultrasound emitted by the Sennheiser Audiobeam is safe at a minimum
distance of 20 cm from the protective grid".
The limit values of the European and international standards and guidelines IEC
71672-1, IEC 61012, GEFAU N 01 and 2003/10/EG are complied with.

How Audiobeam works

Audiobeam is an acoustic spotlight. This means:
Audiobeam is able to focus sound – either directly or via reflections on a surface.
This allows e.g. information in museums and at exhibitions to be radiated directly
from the exhibits – only visitors standing directly in front of an exhibit are
addressed.
Audiobeam limits sound reproduction to precisely defined areas – adjacent areas
are kept sound-free. This helps to create a calmer overall atmosphere in rooms.
Several Audiobeams can be installed in one room without affecting each other.
Astonishing audio effects amaze visitors as Audiobeam allows the sound to come
from unusual directions.
Audiobeam uses state-of-the-art ultrasonic sound transmission technology:
Audiobeam works with ultrasound, modulating the audible sound onto an
ultrasonic carrier frequency. Due to the nonlinearity of air, the desired audio signal
is produced by the self-demodulation effect of the ultrasound wave. At an angle of
30°, a slim sound beam is created that can be heard over long distances.