BACKGROUND Three types of ALS are in widespread use at the present time: Induction Loop (IL) systems, Frequency Modulated (FM) radio systems, and Infrared (IR) systems....
Search Results "Infrared System"
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2. BACKGROUND
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2.3 Infrared (IR) Systems
2.3 Infrared (IR) Systems An IR system transmits audio signals via invisible infrared light waves....
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2.3.1 Standards
2.3.1 Standards There are no standards that we are aware of that specifically cover the unique aspects of IR systems....
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2.3.2 IR Receivers
Body IR receivers look like personal listening systems or FM receivers....
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2.3.3 Issues
2.3.3 Issues * Up to now, 95 kHz has been the sub-carrier most frequently used by manufacturers of IR systems....
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4.1 Research
Nabelek, Donahue, and Letowski (1986) compared the performance of IL, FM, and IR systems to a PA system in a medium size classroom....
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4.2 Functional Comparisons
4.2 Functional Comparisons The advantages, problems and limitations of IL systems were reviewed above, in the description and issues concerning such systems....
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4.33.7* TYPES OF LISTENING SYSTEMS
Audio loops and radio frequency systems are two acceptable types of listening systems....
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4.33.7* Types of Listening Systems
Assistive listening systems (ALS) are intended to augment standard public address and audio systems by providing signals which can be received directly by persons with special receivers...
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Types of Systems
Types of Systems Assistive listening systems are generally categorized by their mode of transmission....
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Infrared Systems
Infrared Systems These systems use invisible (infrared) light beams to carry information from a transmitter connected to a public address system or microphone to special portable receivers...
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6.1 Universal Receiver: Recommendations
that can be (1) tuned to any FM frequency used in ALS in the 72‒75 MHz or 216‒127 MHz range, either wide or narrow channel, (2) adjusted to detect any of the sub-carriers used with IR systems...
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706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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11B-706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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11B-706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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11B-706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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11B-706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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General: ADA Standard Section 706.1
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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A4.33.7 TYPES OF LISTENING SYSTEMS
A listening system that can be used from any seat in a seating area is the most flexible way to meet this specification....
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A4.33.7 Types of Listening Systems
Radio frequency systems can be extremely effective and inexpensive....
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11B-706.1 General
There are hard-wired systems and three types of wireless systems: induction loop, infrared, and FM radio transmission....
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LS-80 Basic Stationary IR System
The Basic Stationary IR System is a great IR solution for those just getting started and those on a tight budget....