Volumatic。速度で音量を自動的に制御します。
Volumatic is the best app to control your music volume based on your speed. As you accelerate, an algorithm increases your volume to counteract your cars road noise.
The simple Automatic mode, uses special settings designed to optimally block road noise as well as keep you from disturbing others at lights. For those who want full control, the manual mode allows you to set the speed and volume range to best fit your taste.