The Sonar Power Manager uses a new technique of user presence detection to turn off the computer screen when you are not present. The goal is to turn off the screen immediately after you leave, even if you just moved the mouse 10 seconds ago.
Put PC to sleep when you’re away
It uses a very simple type of sonar system to accomplish this: Sonar Power Manager uses ultrasound (sound above 20 kHz in frequency that humans cannot hear) on your computer’s regular sound system.
While most laptops can use ultrasound, some cannot. In such cases, the Sonar Power Manager will not correctly detect the user’s presence or produce disturbing harmonics or low frequency noise during sonar operation.
This free software was developed with researchers from Northwestern University and the University of Michigan.
Visit Sonar Power Manager Homepage to learn more and download it.
Why does my computer go to sleep when I walk away?
There are two things you need to check if your computer sleeps when you walk away. First, you need to check the sleep settings or sleep timeout settings in the Windows Settings panel. Second, you need to check if you have installed software like Sonar Power Manager. For your information, this utility helps you put your computer into sleep mode when you are away.
Is it okay to leave the PC in sleep mode all the time?
No, it is not acceptable to leave the PC in sleep mode all the time. Sleep mode is mainly used when you leave your computer for a short time – say 10 minutes or 15 minutes. However, if you are going to leave your PC all day, you can always use the Shut Down or Hibernate option.