Very very Low Audio on Speaker & while using Headphones / Headset on Inspiron 15 3000 Series 3543 - model

Hi, While using headphones / headsets I was able to listen audio clearly when volume level kept to 10, but after few days, I'm not able to hear the any audio clearly, need to increase the system sound level to 100 when playing any video / audio file. When listening without headset / headphones I was able to listen clear audio while playing audio / video files when volume level kept to 20%, but now, even on full volume kept to 100%, I can hear very low volume. It is difficult to play any files on laptop due to this issue. Could you please help to resolve this issue.