This paper focuses on acoustic (sound) side-channel attack and surveys the methods and techniques employed in the attack we will also see some of the different devices which can be under the threat of such attack and finally countermeasures against this attack, which helps in reducing the risk.-This paper focuses on acoustic (sound) side-channel attack and surveys the methods and techniques employed in the attack　we will also see some of the different devices which can be under the threat of such attack and finally countermeasures against this attack, which helps in reducing the risk.