What is a virtual sound source?
A virtual sound source creates the illusion of sound coming from a surface or
direction where no physical loudspeaker is present. The place from which the
listener perceives the sound to be coming is called a Virtual Loudspeaker or a
Virtual Sound Source.
How does SpotDAP operate differently from conventional loudspeakers?
SpotDAP produces sound using highly directional ultrasonic frequencies. This
Conventional
loudspeakers generate audible sound which can only originate from the
loudspeaker location, and which radiates in all directions. SpotDAP provides
greater control of sound placement and volume.
What are some typical applications for SpotDAP technology?
Refer to the Applications section on page 15 for examples of different
What is the diameter and the directivity of the ultrasonic beam and what
affects it?
The ultrasonic beam is comparable in diameter to the active surface area of
the SpotDAP emitter array. See the Audio Dispersion charts on page 20 for the
SpotDAP450 and SpotDAP460 to understand the beams’ dispersion over distance.
The directivity of the SpotDAP unit allows intelligible audio to be heard at 25
meters or more under ideal conditions. The audio source content and ambient
background noise level will impact this distance. Contact an RSF Applications
Engineer at +352 49.74.20.40 or [email protected] for more information.
TROUBLESHOOTING AND FREQUENTLY ASKED QUESTIONS (FAQ)
The ultrasonic beam follows the dispersion chart until it hits a reflective surface.
SpotDAP aplications.
Troubleshooting
If the SpotDAP unit does not generate sound:
Check green LED is on at SpotDAP I/O panel
Check that the AC/DC power supply is on and the DC plug is in the SpotDAP
unit.
Check the volume level of your external audio source.
Unplug the AC power, check the audio input connectors at the SpotDAP unit
and source connection points, wait one minute and plug the AC power
back in.
Unplug the AC power and check that there is source material (CD, DVD,
tape, etc ) in the audio source device. Check that the audio source device
is on. Check that the volume control of the audio source device is not
turned to minimum or off. Wait one minute and plug the AC back in.
Frequently Asked Questions
The SpotDAP uses the HSS technology, but what is HSS?
HyperSonic Sound (HSS ) is a proprietary parametric sound generator,
®
®
RSF’s specifications. The SpotDAP offers many advantages over conventional
loudspeaker systems.
What is a parametric sound generator?
A parametric sound generator produces directional audio from ultrasonic
sound that we can hear. SpotDAP is an advanced type of a parametric sound
generator.
What are the advantages of SpotDAP sound reproduction systems over
conventional loudspeakers?
SpotDAP creates a very directional beam of sound, similar to the light from a
This directional
focus can be used to:
Deliver sound to areas which are either physically impossible to access
or too costly to install conventional loudspeakers (create virtual sound
sources)
Move sound around a room in real time
TROUBLESHOOTING AND FREQUENTLY ASKED QUESTIONS (FAQ)
11
12
The SpotDAP is based on the HSS technology and is manufactured by ATC to
(ATC).
