Due to continuous usage of laptop speaker there is a chance of decrease in the sound of laptop speaker. Here is a quick tip that can be used any windows vista, 7 or 8 laptops in order to increase the sound.
Right click on the speaker icon on the notification bar of your laptop and select the “playback devices”
Now a window named sound will be opened. Just right click on the speakers tab and select the properties option.
Now change the tab from general to enhancements from the window that is displayed.
Now tick the “Loudness Equalization” option and click ok to apply changes. Now you are ready to go! Play any song or movie and feel the difference.