Harsh environmental conditions have the potential to damage important parts of an acoustic recording system. Some companies such as Wildlife Acoustics specialize in building outdoor acoustic recording systems with functionalities and ruggedizations catered to environmental projects. One of their products is the Song Meter 4 (SM4). A team from Brigham Young University and California State University Bakersfield deployed 31 SM4 recorders from 12/2/23 to 9/7/24 in a costal environment located on Vandenberg Space Force Base in southern California. After bringing in the recorders to be serviced all of them were visually in poor condition and we felt the need to check the acoustic fidelity of the microphones to see if the ruggedization of the SM4s was enough to hold up to long term deployment on the coast. To do this a high-fidelity microphone is used as a baseline standard and each microphone on each recorder is systematically compared to this baseline. Measurements are taken in an anechoic chamber to ensure minimal interference from contaminating noise. The difference between the baseline microphone and the microphones that were deployed are compared to the difference between the baseline microphone and four SM4 units that were not deployed. Results will be discussed.