About ADXL354 Frequency Response

Hi,

Below is the frequency response curve of the ADXL354 in the datasheet.There are some questions I want to ask.

1.I want to know how to measure the frequency response curve of the accelerometer.

2.What factors will influence the frequency response of the accelerometer? If the MEMS accelerometer is installed in customer's product, will the mechanical structure design of the product affect the frequency response of the accelerometer?

Thanks!