Smartphones , MP3 players, tablets and other gadgets make music more accessible. But this shift to mobile music brings along a challenge. Listening to a device using headphones can be great. But most mobile devices don't have internal speakers strong enough to provide a really satisfying experience if you want to share music with other people.
One solution is Vibration speaker + Hamburger speaker can make any hard Surfacr become a big speaker to give preface sound.