Silence Guardian

Silence Guardian is an app to manage device audio settings. It will turn sound off for you and then turn it on based on tasks you created.
Only ringer and notification streams are managed. It will not adjust your music or video volume level.
App has clean, intuitive interface and holo look and feel. It optimized for tablets as well.
List of functions:
• create tasks to control device audio settings;
• set days of the week when task should be active;
• set time periods when task should be active;
• set ringer mode (normal, vibrate, silent) to apply when task is active;
• set volume level to apply when task is active;
• buy full version through in-app purchase on settings screen;
• swipe to delete tasks.
This is free, ad-supported version. Ad-free version can be bought on settings screen in the app.