SoundPlus
®
Infrared Listening System
3
System Overview
The Williams Sound SoundPlus
®
Infrared Listening System consists of a MOD 232 Modulator(s) and one or more TX9
Emitters which use invisible infrared (IR) light to broadcast speech or music to wireless infrared receivers.
The system is designed to transmit high quality audio for hearing assistance and language translation applications.
Because the system uses infrared light for transmission, it is not affected by interference from radio equipment and
does not interfere with radio equipment. No FCC license or radio approval is required.
The system can be used with microphones as a stand-alone system, or can be connected to other sound equipment.
Infrared systems generally cannot be used in direct sunlight because of sunlight’s large amount of interfering infrared
light.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
NOTICE: A plasma monitor can degrade the audio quality of the SoundPlus
®
Infrared Listening System.
