Sound level meter is a tool to determine the intensity of the noise on tube baby incubator. Important tool this tool to detect the noise that is constantly evolving, making of this module as a parameter detection and monitoring noise in the baby incubator unit is portable, inexpensive and easy to use so that more effective. The sound is captured by a sound sensor voltage V2 generates intensity in strengthened so that in can desible value with the value range 40-70 dB in the process and if the microcontroller ATMega 8 and displayed on the LCD 16X2. This noise sensor module can measure the noise outside baby incubator at minimum range and maximum 41,1db in 68,9db with a deviation value of 1.9 and averages error of 3.66% and in the baby incubator at minimum range 40,2db and maximum 68,9db with a deviation value of 1.9 and averages error of 3.49%. Calibration tool brand baby incubator can TESNA in value between 52db and 56db in comparison to sound level meter, whereas the module between 48,9db and 54,9db and average error = 3,538% and deviation = 1.9