Noisy Planet User Satisfaction Survey
Thank you for visiting the Noisy Planet Web site!
Please help us improve our site by answering a few questions. This survey will take less than 5 minutes of your time. Your responses will be kept confidential and anonymous.
Would you like to take the online survey now?
To prevent this popup window from opening again during your current visit, your response will be stored in a temporary cookie. Review our privacy policy.
[Close this window]
Videos—What is sound?
Do you see the video below? If not, you need to get QuickTime. QuickTime is free and easy to install.
The text for the video appears to the right. If you experience playback difficulties due to a slow connection, or If you want to watch the video without being connected to the Internet, you can download the video to your computer.
What is sound? Sound is a form of energy, just like electricity and light. Sound is made when air molecules vibrate and move in a pattern called waves, or sound waves. Think of when you clap your hands, or when you slam the car door shut. That action produces soundwaves, which travel to your ears and then to your brain, which says, "I recognize that sound."