[Code of Federal Regulations]
[Title 36, Volume 3]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 36CFR1193.43]

[Page 514]
 
              TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY
 
 CHAPTER XI--ARCHITECTURAL AND TRANSPORTATION BARRIERS COMPLIANCE BOARD
 
PART 1193--TELECOMMUNICATIONS ACT ACCESSIBILITY GUIDELINES--Table of Contents
 
         Subpart C--Requirements for Accessibility and Usability
 
Sec. 1193.43  Output, display, and control functions.

    All information necessary to operate and use the product, including 
but not limited to, text, static or dynamic images, icons, labels, 
sounds, or incidental operating cues, shall comply with each of the 
following, assessed independently:
    (a) Availability of visual information. Provide visual information 
through at least one mode in auditory form.
    (b) Availability of visual information for low vision users. Provide 
visual information through at least one mode to users with visual acuity 
between 20/70 and 20/200 without relying on audio.
    (c) Access to moving text. Provide moving text in at least one 
static presentation mode at the option of the user.
    (d) Availability of auditory information. Provide auditory 
information through at least one mode in visual form and, where 
appropriate, in tactile form.
    (e) Availability of auditory information for people who are hard of 
hearing. Provide audio or acoustic information, including any auditory 
feedback tones that are important for the use of the product, through at 
least one mode in enhanced auditory fashion (i.e., increased 
amplification, increased signal-to-noise ratio, or combination). For 
transmitted voice signals, provide a gain adjustable up to a minimum of 
20 dB. For incremental volume control, provide at least one intermediate 
step of 12 dB of gain.
    (f) Prevention of visually-induced seizures. Visual displays and 
indicators shall minimize visual flicker that might induce seizures in 
people with photosensitive epilepsy.
    (g) Availability of audio cutoff. Where a product delivers audio 
output through an external speaker, provide an industry standard 
connector for headphones or personal listening devices (e.g., phone-like 
handset or earcup) which cuts off the speaker(s) when used.
    (h) Non-interference with hearing technologies. Reduce interference 
to hearing technologies (including hearing aids, cochlear implants, and 
assistive listening devices) to the lowest possible level that allows a 
user to utilize the product.
    (i) Hearing aid coupling. Where a product delivers output by an 
audio transducer which is normally held up to the ear, provide a means 
for effective wireless coupling to hearing aids.