The noise measurement application that allows you to measure the actual dB and noise. This decibels of volume or decibel meter (dB meter), the noise meter, sound level meter (SPL meter). The noise of their surroundings is the sound level meter to measure how much. This shows that the referenced using your built-in microphone. You can measure the number of Android devices in dB and the actual sound level meter. You are the maximum value and the minimum value, starting the measurement noise,