In this website you can search a song by singing or humming the song for just 10 seconds.

1. Click on the Start Voice Search button.

2. If you are asked to allow midomi to access your microphone, click the "Allow" button.

3. Sing or hum approximately 10 seconds of the song you are searching for

4. click "Done" under the recording bar.

5. See the search results, and the midomi users who helped find the song

http://www.midomi.com/