Provide an option to enable the user to adjust the volume.
Rationale
Users may not be able to hear or distinguish sounds at certain volumes, so they need the ability to adjust the volume. A user that is hard of hearing can have difficulty hearing auditory output and needs to adjust the volume so they can hear the warnings and messages. A user with a vision impairment may depend on speech output and will need to adjust the volume to accommodate different environmental conditions.
Development techniques
One or more of the following techniques are the minimum required to meet Checkpoint 3.3 from the IBM Software Accessibility Checklist:
- Respect the system volume settings.
- Provide volume control in the software.
- Windows applications that play sounds by calling PlaySound and specifying a registry-based sound event use system volume settings and do not require additional work to be accessible. The user can change the volume using Sound options in the Control Panel.
Testing techniques
Test the software to ensure that it complies with accessibility requirements.
Tools
There are no tools required to test this checkpoint.
Techniques
The following techniques are required to verify this checkpoint:
| Action | Result |
|---|---|
| 1.If the software respects system settings for volume, increase the volume through the Control Panel. Verify warnings and messages can be heard. |
Pass:
|
| 2.If the software provides an option to adjust the volume, increase the volume. Verify warnings and messages can be heard. |
Pass:
|
©2001, 2008 IBM Corporation
Last updated January 23, 2008.