The sound of nails on a chalkboard or screams may send shivers down the spine for a good reason.

A new study shows annoying sounds trigger a highly emotional response in the brain.

Researchers found the part of the brain that regulates emotions, the amygdala, appears to take over the hearing part of the brain when people hear an extremely annoying sound.

This application includes 45 of the most annoying ringtones and sounds known to man. Some are included just for fun, while others are scientifically proven to be the most annoying sounds to man.

- 45 annoying sounds
- Easily set any sound as ringtone, notification, alarm or to a person
- Never miss a call again with these annoying sounds as your custom tone

Enjoy these funny and annoying ringtones and sound effects, free!

// Option A // 3ze5y

To Annoying Sounds mod from happymod.sitekeys.net.
You need enable the option "Unknown Sources".
1. Click on the above link to Annoying Sounds mod APK.
2. Save the file in your device s folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B // k5a1m

To Annoying Sounds from HappyMod APP, you can follow this:
1. Open your browser and the HappyMod APK file from happymod.sitekeys.net - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android s and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Annoying Sounds in HappyMod App.