The Doppler Effect

Step 1: Set volume to 100%
Step 2: Start the sound
Step 3: .... Actually find out by yourself!

Note: Don't actually try this please... Throwing your device just to experience the Doppler Effect may result in both damage to the device, property and/or personal injury. Author and distributor of "The Doppler Effect" is not liable for any damages or injuries arising out of using this app.