Sony MDR DS4000 - Manual (Page 20)

Operation
20 GB
Infrared transmission area
The approximate infrared transmission area from the processor is shown in the
illustration below.
Notes
• Because this system uses infrared signals, sound may be interrupted if these signals are
obstructed. This is due to the infrared signal characteristics, and is not a malfunction.
• Do not cover the infrared sensors with your hands or hair.
• When you use the headphones inside the area in the illustration above, the processor can be
placed in front, behind or by the side of you.
• Any noise you hear through the headphones may vary depending on the processor position
and room conditions. It is recommended that you place the processor in a location that
produces the clearest sound.
• Do not use this system in areas exposed to direct sunlight or strong light. The sound may be
interrupted.
• Plasma displays may interfere with normal operation of this system.
• Mixed signals may result if the processor is used with other processors or transmitters.
If an audio signal is not input for 10 minutes
Infrared signal emission from the processor automatically stops when an audio signal
is not input for 10 minutes. The infrared signals are automatically emitted when an
audio signal is input again. The emission of the infrared signals may stop when an
extremely low sound is emitted for about 10 minutes during analogue input. If this
happens, raise the volume of the connected audio or video component and lower the
volume of the headphones. If signal noise is output from a component connected to
the LINE IN jacks, infrared signal emission may not stop.
Notes
• The brightness of the infrared emitter on the digital surround processor may vary. However,
this does not affect the transmission area.
• The headphones should be used within the infrared transmission area (see “Infrared
transmission area”).
• The surround sound effect may not be obtained from sound sources that do not incorporate
video, such as music CDs.
• This system simulates the average HRTF * common to most people. However, the effect can
differ from person to person since the HRTF can vary between individuals.
* Head Related Transfer Function
Digital surround
processor
Approx. 3 m
(10 ft)
Infrared signal
Approx.
7 m (23 ft) 45°
45°
Approx.
3 m (10 ft)