When it comes to air pumps, most people want to know how to make theirs more silent, as it is common for air pumps to generate a lot of noise while creating air flow. The noise that these pumps make is similar to tapping sounds which can be annoying. One of the ways you can reduce the noise output of your air pump is to check the placement of the air stone in the tank. Air stones create bubbles and the process is generally noisy, especially when it is close to the top of the tank. In a situation such as this one, shifting the air stone to the bottom of the tank should help with the noise.\r