With hundreds of thousands of sound clips, FreeSFX should have just the sound files you’re looking for. Make sure to check out any licenses that may be attached to files here, as some require citation to show the creator’s information.
The audio files on SoundJay are 100% free to use as long as you don’t try to resell the audio files. The site is meant to be a resource for downloading and using the sounds found here. Categories include button sounds, human sound effects, and music tracks.
The resources listed above are a great place to start when trying to source music and sound effects. When you listen to TV or play a game you might notice some things like sirens and screams tend to sound the same. This is because those are free files that are available in some of the sites listed above.
With over 400,000 tracks, Jamendo boasts one of the largest online repositories of free music and sound effects. Free, legal music and sound effects to download and use as you see fit, Jamendo is a lifesaver when you can’t seem to find the sound you’re looking for.