The Sound Meter Model 4431 is ideally designed to provide an extremely high quality performance and functionality for very specific purposes. It is built with a very lightweight and compact form with an A, C, and F weighting modes which helps in the operation of the device. It is provided with a very sensitive electric condenser microphone to enhance its good quality condition. The superior quality device is integrated with a large 4 digit display incorporated with a 0.1 dB resolution.