Ficheiro:Assistive Listening Devices 2.JPG


























DescriçãoAssistive Listening Devices 2.JPG

Assistive Listening Systems

These systems transmit amplified sound via hearing aids, headsets or other devices. They include infrared, loop and FM systems. Portable systems may be available from the same audiovisual equipment suppliers that service conferences and meetings.
Data 23 de fevereiro de 2008
Origem State of Rhode Island http://www.cdhh.ri.gov/logo/
Autor State of Rhode Island
Permissão
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See below.



Public domainPublic domainfalsefalse





Public domain
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number D9-6, which states specifically on page I-1 that:
Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain. Traffic control devices contained in this Manual shall not be protected by a patent, trademark, or copyright, except for the Interstate Shield and any other items owned by FHWA.
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