Today, the additive manufacturing method is developing rapidly for fabricating the parts. It is also very important to find the mechanical properties of the parts obtained from this production process. In this article, the elastic we will be investigated and the acoustic properties of two types of polymer materials. One of the methods of measuring the elastic properties of parts is the ultrasonic non-destructive testing method. Changes in the manufacturing parameters, including the material of the part, the layering speed, and the thickness of the layer are effective on the elastic properties of the manufactured part. Therefore, the effects of changes in these parameters on the final properties of the manufactured parts have been investigated. The results show that by changing these parameters, the elastic and acoustic properties of the parts will change a lot. The result of elastic coefficients was calculated with elastic tensor for anisotropic parts and wave attenuation for different directions. Four samples, two samples of ABS, and two samples of PLA were used. Also, two-layer thicknesses and layering speed were used. Then, the elastic coefficients were calculated with the anisotropic tensor for the anisotropic parts and the wave attenuation for different directions.