When I listen to music or audiobooks with my Android phone, I always felt the sound was too small, especially in the car. I found a way to solve it, installing a volume booster.
There are many applications which can work on Android. I checked several blog posts in Japanese and in English, and I chose “Volume Booster.”
It is really user-friendly and easy to use. You have to just turn up the volume and almost all sound clips will be louder. As the app says, be careful not to make the volume too loud.
Now I feel less stressed listening to sound clips with my smartphone. I am thinking to take videos on Youtube because it has more information than writing articles on this blog.