Sennheiser Audiobeam - Manual (Page 4)

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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:
y 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.
y 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.
y 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.