Sennheiser 9859 User Manual
AudioBeam
Conference and Information Systems | AudioBeam
General Description
AudioBeam is a new type of directional loudspeaker that is able to focus sound like
the light beam of a torch, creating an audio spotlight for museums, exhibitions,
theme parks and many other applications. Unlike conventional loudspeakers, which
are only able to focus sound at high frequencies, AudioBeam emits sound as a lobe
that can be precisely directed and is reflected by objects.
Cat. No. 009859
Tec hnica l Data AudioBeam Master
Modulation ..................................................... wideband AM
Carrier frequency ........................................................40 kHz
Amplitude limiting ....................................limiter amplifi er
Audio channels ......................................................................1
Audio input...................................balanced XLR-3F socket,
contacts metallically separated
Input sensitivity ........................................... 6 dBm (1.55 V)
or -14 dBm (150 mV)
Impedance ..................................................................... 600 Ω
Sound pressure level ....................................... 75 dB ± 5 dB
Audio output...............1 x BNC, 50 Ω, short-circuit-proof
Amplifi er output .............................................approx. 90 W
Power supply............... via switched-mode power supply
110 – 240 V, 50 – 60 Hz, max. 100 W
Dimensions............................................ 264 x 82 x 320 mm
Weight............................................................. approx. 3.1 kg
Features
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Ultrasonic loudspeaker focusses sound like a light beam
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Switchable sensitivity, +6 dB/–15 dB
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Automatically adapts to mains voltages between 110 and 240 V,
and mains frequencies between 50 and 60 Hz
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Delivery includes: 1 AudioBeam, mains cable (European, UK, or USA version)
Recommended Accessories
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Thread adaptor
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GZP 10 mounting plate
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GZG 1029 swivel joint
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MZT 100 anti-vibration table stand
AudioBeam
Conference and Information Systems | AudioBeam
AudioBeam
The AudioBeam directional loudspeaker works with ultra-sound, modulating the
audible sound onto an ultrasonic carrier frequency, much like a radio station does,
and then emitting this signal via 150 special piezoelectric pressure transducers.
Audible sound is only generated at a distance from the AudioBeam, when the signal
is demodulated because of the non-linearity of air. This can be imagined like the
creation of many small, virtual loudspeakers in the ultrasonic zone.
No sound is audible beside or behind an AudioBeam – you will only hear the audio
information if you are directly within the sound beam, or if the sound is refl ected
by a smooth surface. This makes AudioBeam an ideal tool for information terminals,
exhibitions, or even conferences where various AudioBeams emit several languages
to a defi ned part of the auditorium.
As the effects of ultrasound on the human body have not yet been thoroughly
investigated, AudioBeam is fi tted with a sensor that switches the loudspeaker off
when it registers movement within four metres.
AudioBeam is suited to a wide variety of applications:
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For theme parks and exhibitions
AudioBeam is an ideal tool for theme parks where it creates amazing effects
with moving sound when combined with a small stepper motor. In an exhibition,
AudioBeam will give explanations on an exhibit, which are only audible within a
defi ned area. When mounted opposite an exhibit, the work of art will seem to
”talk“ to the visitors, as the ultrasonic beam is refl ected by smooth surfaces.
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For the PC
PC users can forget all about headphones. AudioBeam is their personal
loudspeaker – without disturbing others in the offi ce.
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Automatic machines with voice function
A very discreet way of addressing customers: the sound will only reach the person
directly in front of the machine.
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In safety areas
AudioBeam can be used to directly address an individual person within a safety
area – putting them in an audio spotlight.
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